US2017067904A1PendingUtilityA1

Compositions and methods for membrane protein detergent stability screen

Assignee: UNIV VIRGINIA PATENT FOUNDATIONPriority: Jun 29, 2009Filed: Nov 18, 2016Published: Mar 9, 2017
Est. expiryJun 29, 2029(~2.9 yrs left)· nominal 20-yr term from priority
B01D 15/3804C30B 7/08G01N 33/6803
47
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Claims

Abstract

The invention provides methods to assess protein stability and to obtain sizing information. In one aspect, the screen comprises a 94 detergent panel and a series of MWCO filtered microplates. A protein of interest is bound to an affinity matrix and aliquoted into a 96-well microplate. Wells containing the immobilized protein are washed in the new detergent and then eluted in the new detergent into a collection plate. Protein not stable in the new detergent is precipitated on the resin and not present in the elutions. Half of the elution is passed through a high (i.e., 300 kDa) MWCO microplate and the other half through a low (i.e., 100 kDa) MWCO microplate. Elutions from the microplates are spotted on a nitrocellulose membrane, visualized by Western analysis (or by some other method), and quantified. The high MWCO provides stability readout and the ratio of low/high kDa provides sizing information.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A method for determining the stability and size of a protein in a detergent, said method comprising:
 a) obtaining a solution comprising said protein in a first detergent;   b) adding an effective amount of an affinity resin to said solution;   c) adding an aliquot of said solution comprising said protein in a first detergent and an affinity resin to a first chamber, said first chamber comprising a filter wherein said pore size is about 0.2 μm;   d) washing said first chamber with a wash solution comprising a different detergent;   e) eluting said protein in said first chamber with an elution solution comprising said different detergent and collecting the eluate;   f) passing an aliquot of said eluate through a second chamber comprising a high molecular weight cut-off filter and another aliquot of said eluate through a third chamber comprising a low molecular weight cut-off filter;   g) measuring the amount of protein in the eluate passing through the high molecular weight cut-off filter and the amount of protein in the eluate passing through the low molecular weight cut-off filter; and   h) comparing the amount of protein eluted through the high molecular weight cut-off filter with the amount of protein eluted through the low molecular weight cut-off filter, thereby determining the stability and size of a protein in at least one detergent.   
     
     
         2 . The method of  claim 1 , wherein said first chamber is a well of a multiwell microplate. 
     
     
         3 . The method of  claim 1 , wherein said second chamber is a well of a multiwell microplate, further wherein each well comprises a high molecular weight cut-off filter. 
     
     
         4 . The method of  claim 1 , wherein said third chamber is a well of a multiwell microplate, further wherein each well comprises a low molecular weight cut-off filter. 
     
     
         5 . The method of  claim 2 , wherein at least two wells are used. 
     
     
         6 . The method of  claim 5 , wherein multiple different detergents are used. 
     
     
         7 . The method of  claim 6 , wherein when multiple detergents are tested, each well comprising a detergent comprises a different detergent than the other wells comprising a detergent, and optionally one or more wells comprise a positive control and one or more wells comprise a negative control. 
     
     
         8 . The method of  claim 1 , wherein about 20 column volumes of said wash solution are used for said wash. 
     
     
         9 . The method of  claim 1 , wherein about 6 column volumes of said elution solution are used for said elution. 
     
     
         10 . The method of  claim 1 , wherein said high molecular weight cut-off filter is about 300 kDa. 
     
     
         11 . The method of  claim 1 , wherein said low molecular weight cut-off filter is about 100 kDa. 
     
     
         12 . The method of  claim 7 , wherein said multiwell plate is a 96, 384, or 1536 well plate. 
     
     
         13 . The method of  claim 12 , wherein said 96 well plate is a Society for Biomolecular Sciences format plate. 
     
     
         14 . The method of  claim 12 , wherein 94 different detergents are tested. 
     
     
         15 . The method of  claim 1 , wherein said different detergent is selected from the following table: 
       
         
           
                 
                 
                 
                 
               
                     
                 
                   Well 
                   Abbrev. 
                   Name 
                   [Det] mM 
                 
                     
                 
                     
                 
                 
                 
                 
                 
                 
               
                   A1 
                     
                   No detergent (−control) 
                     
                     
                 
                   A2 
                     
                   Empty well for current detergent (+control) 
                 
                   A3 
                   Z3-12 
                   ZWITTERGENT ® 3-12 
                   8.4 
                   (2.8) 
                 
                   A4 
                   Z3-14 
                   ZWITTERGENT ® 3-14 
                   10 
                   (0.2) 
                 
                   A5 
                   DMG 
                   n-Decyl-N,N-dimethylglycine 
                   38 
                   (19) 
                 
                   A6 
                   DOMG 
                   n-Dodecyl-N,N-dimethylglycine 
                   4.5 
                   (1.5) 
                 
                   A7 
                   DAO 
                   n-Decyl-N,N-dimethylamine-N-oxide 
                   21 
                   (10.5) 
                 
                   A8 
                   UDAO 
                   n-Undecyl-N,N,-dimethylamine-N-oxide 
                   9.6 
                   (3.2) 
                 
                   A9 
                   LDAO 
                   n-Dodecyl-N,N-dimethylamine-N-oxide 
                   3 
                   (1) 
                 
                   A10 
                   C-DDFOS 
                   C-DODECAFOS ™ 
                   44 
                   (22) 
                 
                   A11 
                   CF-4 
                   CYCLOFOS ™-4 
                   28 
                   (14) 
                 
                   A12 
                   CF-5 
                   CYCLOFOS ™-5 
                   13.5 
                   (4.5) 
                 
                   B1 
                   CF-6 
                   CYCLOFOS ™-6 
                   8.04 
                   (2.68) 
                 
                   B2 
                   CF-7 
                   CYCLOFOS ™-7 
                   6.2 
                   (0.62) 
                 
                   B3 
                   FC-10 
                   FOS-CHOLINE ®-10 
                   22 
                   (11) 
                 
                   B4 
                   FC-11 
                   FOS-CHOLINE ®-11 
                   5.55 
                   (1.85) 
                 
                   B5 
                   FC-12 
                   FOS-CHOLINE ®-12 
                   4.5 
                   (1.5) 
                 
                   B6 
                   FC-13 
                   FOS-CHOLINE ®-13 
                   7.5 
                   (0.75) 
                 
                   B7 
                   FC-14 
                   FOS-CHOLINE ®-14 
                   6 
                   (0.12) 
                 
                   B8 
                   FC-I11 
                   FOS-CHOLINE ®-ISO-11 
                   53.2 
                   (26.6) 
                 
                   B9 
                   FC-I11-6U 
                   FOS-CHOLINE ®-ISO-11-6U 
                   51.6 
                   (25.8) 
                 
                   B10 
                   FC-I9 
                   FOS-CHOLINE ®-ISO-9 
                   64 
                   (32) 
                 
                   B11 
                   FC-U10-11 
                   FOS-CHOLINE ®-UNSAT-11-10 
                   15.5 
                   (6.2) 
                 
                   B12 
                   DHPC 
                   
                     1,2-Diheptanoyl-sn-glycero-3-phosphocholine 
                   
                   4.2 
                   (1.4) 
                 
                   C1 
                   LPC-10 
                   LysoPC-10 
                   20 
                   (8) 
                 
                   C2 
                   LPC-12 
                   LysoPC-12 
                   7 
                   (0.7) 
                 
                   C3 
                   FOSFEN-9 
                   FOSFEN ™-9 
                   4.05 
                   (1.35) 
                 
                   C4 
                   CHAPS 
                   CHAPS 
                   20 
                   (8) 
                 
                   C5 
                   CHAPSO 
                   CHAPSO 
                   20 
                   (8) 
                 
                   C6 
                   DDMAU 
                   n-Dodecyl-N,N-(dimethylammonio)undecanoate 
                   6.5 
                   (0.13) 
                 
                   C7 
                   DDMAB 
                   n-Dodecyl-N,N-(dimethylammonio)butyrate 
                   12.9 
                   (4.3) 
                 
                   C8 
                   LAPAO 
                   LAPAO 
                   4.8 
                   (1.6) 
                 
                   C9 
                   TRIPAO 
                   TRIPAO 
                   13.5 
                   (4.5) 
                 
                   C10 
                   T-20 
                   TWEEN ® 20 
                   5.9 
                   (0.059) 
                 
                   C11 
                   BRIJ-35 
                   BRIJ ®35 
                   9.1 
                   (0.091) 
                 
                   C12 
                   TX-100 
                   TRITON ® X-100 
                   11.5 
                   (0.23) 
                 
                   D1 
                   TX-114 
                   TRITON ® X-114 
                   10 
                   (0.2) 
                 
                   D2 
                   TX-305 
                   TRITON ® X-305 
                   6.5 
                   (0.65) 
                 
                   D3 
                   TX-405 
                   TRITON ® X-405 
                   8.1 
                   (0.81) 
                 
                   D4 
                   NID-P40 
                   [Octylphenoxy]polyethoxyethanol 
                   15 
                   (0.3) 
                 
                   D5 
                   APO8 
                   Dimethyloctylphosphine oxide 
                   80 
                   (40) 
                 
                   D6 
                   APO9 
                   Dimethylnonylphosphine oxide 
                   20 
                   (10) 
                 
                   D7 
                   APO10 
                   Dimethyldecylphosphine oxide 
                   13.98 
                   (4.66) 
                 
                   D8 
                   APO11 
                   Dimethylundecylphosphine oxide 
                   3.6 
                   (1.2) 
                 
                   D9 
                   APO12 
                   Dimethyldodecylphosphine oxide 
                   5.7 
                   (0.57) 
                 
                   D10 
                   C6E3 
                   Triethylene glycol monohexyl ether 
                   46 
                   (23) 
                 
                   D11 
                   C6E4 
                   Tetraethylene glycol monohexyl ether 
                   60 
                   (30) 
                 
                   D12 
                   C6E5 
                   Pentaethylene glycol monohexyl ether 
                   74 
                   (37) 
                 
                   E1 
                   C7E5 
                   Pentaethylene glycol monoheptyl ether 
                   42 
                   (21) 
                 
                   E2 
                   C8E4 
                   Tetraethylene glycol monooctyl ether 
                   20 
                   (8) 
                 
                   E3 
                   C8E5 
                   Pentaethylene glycol monooctyl ether 
                   17.75 
                   (7.1) 
                 
                   E4 
                   C8E6 
                   Hexaethylene glycol monooctyl ether 
                   25 
                   (10) 
                 
                   E5 
                   C10E5 
                   Pentaethylene glycol monodecyl ether 
                   8.1 
                   (0.81) 
                 
                   E6 
                   C10E6 
                   Hexaethylene glycol monodecyl ether 
                   9 
                   (0.9) 
                 
                   E7 
                   C10E9 
                   Polyoxyethylene(9)decyl ether 
                   3.9 
                   (1.3) 
                 
                   E8 
                   C12E8 
                   Octaethylene glycol monododecyl ether 
                   9 
                   (0.09) 
                 
                   E9 
                   C12E9 
                   Polyoxyethylene(9)dodecyl ether 
                   5 
                   (0.05) 
                 
                   E10 
                   C12E10 
                   Polyoxyethylene(10)dodecyl ether 
                   10 
                   (0.2) 
                 
                   E11 
                   C13E8 
                   Polyoxyethylene(8)tridecyl ether 
                   10 
                   (0.1) 
                 
                   E12 
                   CHAP 
                   Big CHAP 
                   8.7 
                   (2.9) 
                 
                   F1 
                   CHAP-D 
                   Big CHAP, deoxy 
                   4.2 
                   (1.4) 
                 
                   F2 
                   OHES 
                   Octyl-2-hydroxyethyl-sulfoxide 
                   48.4 
                   (24.2) 
                 
                   F3 
                   RDHPOS 
                   Rac-2,3-dihydroxypropyloctylsulfoxide 
                   48.4 
                   (24.2) 
                 
                   F4 
                   GX-100 
                   Genapol ® X-100 
                   7.5 
                   (0.15) 
                 
                   F5 
                   HTG 
                   n-Heptyl-β-D-thioglucopyranoside 
                   58 
                   (29) 
                 
                   F6 
                   OG 
                   n-Octyl-β-D-glucopyranoside 
                   36 
                   (18) 
                 
                   F7 
                   NG 
                   n-Nonyl-β-D-glucopyranoside 
                   16.25 
                   (6.5) 
                 
                   F8 
                   CYGLU-3 
                   CYGLU ®-3 
                   56 
                   (28) 
                 
                   F9 
                   HECAMEG 
                   HECAMEG 
                   39 
                   (19.5) 
                 
                   F10 
                   HEGA-9 
                   Hega ®-9 
                   78 
                   (39) 
                 
                   F11 
                   C-HEGA-10 
                   C-Hega ®-10 
                   70 
                   (35) 
                 
                   F12 
                   C-HEGA-11 
                   C-Hega ®-11 
                   23 
                   (11.5) 
                 
                   G1 
                   CYMAL-3 
                   CYMAL ®-3 
                   60 
                   (30) 
                 
                   G2 
                   CYMAL-4 
                   CYMAL ®-4 
                   19 
                   (7.6) 
                 
                   G3 
                   CYMAL-5 
                   CYMAL ®-5 
                   7.2 
                   (2.4) 
                 
                   G4 
                   CYMAL-6 
                   CYMAL ®-6 
                   5.6 
                   (0.56) 
                 
                   G5 
                   CYMAL-7 
                   CYMAL ®-7 
                   9.5 
                   (0.19) 
                 
                   G6 
                   DMHM 
                   2,6-Dimethyl-4-heptyl-β-D-maltoside 
                   55 
                   (27.5) 
                 
                   G7 
                   OM 
                   n-Octyl-β-D-maltopyranoside 
                   39 
                   (19.5) 
                 
                   G8 
                   NM 
                   n-Nonyl-β-D-maltopyranoside 
                   15 
                   (6) 
                 
                   G9 
                   DαM 
                   n-Decyl-α-D-maltopyranoside 
                   4.8 
                   (1.6) 
                 
                   G10 
                   DM 
                   n-Decyl-β-D-maltopyranoside 
                   5.4 
                   (1.8) 
                 
                   G11 
                   UDαM 
                   n-Undecyl-α-D-maltopyranoside 
                   5.8 
                   (0.58) 
                 
                   G12 
                   UDM 
                   n-Undecyl-β-D-maltopyranoside 
                   5.9 
                   (0.59) 
                 
                   H1 
                   ωUDM 
                   ω-Undecylenyl-β-D-maltopyranoside 
                   3.6 
                   (1.2) 
                 
                   H2 
                   DDαM 
                   n-Dodecyl-α-D-maltopyranoside 
                   7.5 
                   (0.15) 
                 
                   H3 
                   DDM 
                   n-Dodecyl-β-D-maltopyranoside 
                   8.5 
                   (0.17) 
                 
                   H4 
                   TDM 
                   n-Tridecyl-β-D-maltopyranoside 
                   1.5 
                   (0.03) 
                 
                   H5 
                   OTM 
                   n-Octyl-β-D-thiomaltopyranoside 
                   21.25 
                   (8.5) 
                 
                   H6 
                   NTM 
                   n-Nonyl-β-D-thiomaltopyranoside 
                   9.6 
                   (3.2) 
                 
                   H7 
                   DTM 
                   n-Decyl-β-D-thiomaltopyranoside 
                   9 
                   (0.9) 
                 
                   H8 
                   UDTM 
                   n-Undecyl-β-D-thiomaltopyranoside 
                   10.5 
                   (0.21) 
                 
                   H9 
                   DDTM 
                   n-Dodecyl-β-D-thiomaltopyranoside 
                   5 
                   (0.05) 
                 
                   H10 
                   S-8 
                   Sucrose8 
                   48.8 
                   (24.4) 
                 
                   H11 
                   S-10 
                   Sucrose10 
                   7.5 
                   (2.5) 
                 
                   H12 
                   S-12 
                   Sucrose12 
                   15 
                   (0.3) 
                 
                     
                 
             
                
                
                
               
               
                
               
            
             
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
               
            
           
         
       
     
     
         16 . The method of  claim 14 , wherein said detergents and controls are selected from the following table: 
       
         
           
                 
                 
                 
                 
               
                     
                 
                   Well 
                   Abbrev. 
                   Name 
                   [Det] mM 
                 
                     
                 
                     
                 
                 
                 
                 
                 
                 
               
                   A1 
                     
                   No detergent (−control) 
                     
                     
                 
                   A2 
                     
                   Empty well for current detergent (+control) 
                 
                   A3 
                   Z3-12 
                   ZWITTERGENT ® 3-12 
                   8.4 
                   (2.8) 
                 
                   A4 
                   Z3-14 
                   ZWITTERGENT ® 3-14 
                   10 
                   (0.2) 
                 
                   A5 
                   DMG 
                   n-Decyl-N,N-dimethylglycine 
                   38 
                   (19) 
                 
                   A6 
                   DOMG 
                   n-Dodecyl-N,N-dimethylglycine 
                   4.5 
                   (1.5) 
                 
                   A7 
                   DAO 
                   n-Decyl-N,N-dimethylamine-N-oxide 
                   21 
                   (10.5) 
                 
                   A8 
                   UDAO 
                   n-Undecyl-N,N,-dimethylamine-N-oxide 
                   9.6 
                   (3.2) 
                 
                   A9 
                   LDAO 
                   n-Dodecyl-N,N-dimethylamine-N-oxide 
                   3 
                   (1) 
                 
                   A10 
                   C-DDFOS 
                   C-DODECAFOS ™ 
                   44 
                   (22) 
                 
                   A11 
                   CF-4 
                   CYCLOFOS ™-4 
                   28 
                   (14) 
                 
                   A12 
                   CF-5 
                   CYCLOFOS ™-5 
                   13.5 
                   (4.5) 
                 
                   B1 
                   CF-6 
                   CYCLOFOS ™-6 
                   8.04 
                   (2.68) 
                 
                   B2 
                   CF-7 
                   CYCLOFOS ™-7 
                   6.2 
                   (0.62) 
                 
                   B3 
                   FC-10 
                   FOS-CHOLINE ®-10 
                   22 
                   (11) 
                 
                   B4 
                   FC-11 
                   FOS-CHOLINE ®-11 
                   5.55 
                   (1.85) 
                 
                   B5 
                   FC-12 
                   FOS-CHOLINE ®-12 
                   4.5 
                   (1.5) 
                 
                   B6 
                   FC-13 
                   FOS-CHOLINE ®-13 
                   7.5 
                   (0.75) 
                 
                   B7 
                   FC-14 
                   FOS-CHOLINE ®-14 
                   6 
                   (0.12) 
                 
                   B8 
                   FC-I11 
                   FOS-CHOLINE ®-ISO-11 
                   53.2 
                   (26.6) 
                 
                   B9 
                   FC-I11-6U 
                   FOS-CHOLINE ®-ISO-11-6U 
                   51.6 
                   (25.8) 
                 
                   B10 
                   FC-I9 
                   FOS-CHOLINE ®-ISO-9 
                   64 
                   (32) 
                 
                   B11 
                   FC-U10-11 
                   FOS-CHOLINE ®-UNSAT-11-10 
                   15.5 
                   (6.2) 
                 
                   B12 
                   DHPC 
                   
                     1,2-Diheptanoyl-sn-glycero-3-phosphocholine 
                   
                   4.2 
                   (1.4) 
                 
                   C1 
                   LPC-10 
                   LysoPC-10 
                   20 
                   (8) 
                 
                   C2 
                   LPC-12 
                   LysoPC-12 
                   7 
                   (0.7) 
                 
                   C3 
                   FOSFEN-9 
                   FOSFEN ™-9 
                   4.05 
                   (1.35) 
                 
                   C4 
                   CHAPS 
                   CHAPS 
                   20 
                   (8) 
                 
                   C5 
                   CHAPSO 
                   CHAPSO 
                   20 
                   (8) 
                 
                   C6 
                   DDMAU 
                   n-Dodecyl-N,N-(dimethylammonio)undecanoate 
                   6.5 
                   (0.13) 
                 
                   C7 
                   DDMAB 
                   n-Dodecyl-N,N-(dimethylammonio)butyrate 
                   12.9 
                   (4.3) 
                 
                   C8 
                   LAPAO 
                   LAPAO 
                   4.8 
                   (1.6) 
                 
                   C9 
                   TRIPAO 
                   TRIPAO 
                   13.5 
                   (4.5) 
                 
                   C10 
                   T-20 
                   TWEEN ® 20 
                   5.9 
                   (0.059) 
                 
                   C11 
                   BRIJ-35 
                   BRIJ ®35 
                   9.1 
                   (0.091) 
                 
                   C12 
                   TX-100 
                   TRITON ® X-100 
                   11.5 
                   (0.23) 
                 
                   D1 
                   TX-114 
                   TRITON ® X-114 
                   10 
                   (0.2) 
                 
                   D2 
                   TX-305 
                   TRITON ® X-305 
                   6.5 
                   (0.65) 
                 
                   D3 
                   TX-405 
                   TRITON ® X-405 
                   8.1 
                   (0.81) 
                 
                   D4 
                   NID-P40 
                   [Octylphenoxy]polyethoxyethanol 
                   15 
                   (0.3) 
                 
                   D5 
                   APO8 
                   Dimethyloctylphosphine oxide 
                   80 
                   (40) 
                 
                   D6 
                   APO9 
                   Dimethylnonylphosphine oxide 
                   20 
                   (10) 
                 
                   D7 
                   APO10 
                   Dimethyldecylphosphine oxide 
                   13.98 
                   (4.66) 
                 
                   D8 
                   APO11 
                   Dimethylundecylphosphine oxide 
                   3.6 
                   (1.2) 
                 
                   D9 
                   APO12 
                   Dimethyldodecylphosphine oxide 
                   5.7 
                   (0.57) 
                 
                   D10 
                   C6E3 
                   Triethylene glycol monohexyl ether 
                   46 
                   (23) 
                 
                   D11 
                   C6E4 
                   Tetraethylene glycol monohexyl ether 
                   60 
                   (30) 
                 
                   D12 
                   C6E5 
                   Pentaethylene glycol monohexyl ether 
                   74 
                   (37) 
                 
                   E1 
                   C7E5 
                   Pentaethylene glycol monoheptyl ether 
                   42 
                   (21) 
                 
                   E2 
                   C8E4 
                   Tetraethylene glycol monooctyl ether 
                   20 
                   (8) 
                 
                   E3 
                   C8E5 
                   Pentaethylene glycol monooctyl ether 
                   17.75 
                   (7.1) 
                 
                   E4 
                   C8E6 
                   Hexaethylene glycol monooctyl ether 
                   25 
                   (10) 
                 
                   E5 
                   C10E5 
                   Pentaethylene glycol monodecyl ether 
                   8.1 
                   (0.81) 
                 
                   E6 
                   C10E6 
                   Hexaethylene glycol monodecyl ether 
                   9 
                   (0.9) 
                 
                   E7 
                   C10E9 
                   Polyoxyethylene(9)decyl ether 
                   3.9 
                   (1.3) 
                 
                   E8 
                   C12E8 
                   Octaethylene glycol monododecyl ether 
                   9 
                   (0.09) 
                 
                   E9 
                   C12E9 
                   Polyoxyethylene(9)dodecyl ether 
                   5 
                   (0.05) 
                 
                   E10 
                   C12E10 
                   Polyoxyethylene(10)dodecyl ether 
                   10 
                   (0.2) 
                 
                   E11 
                   C13E8 
                   Polyoxyethylene(8)tridecyl ether 
                   10 
                   (0.1) 
                 
                   E12 
                   CHAP 
                   Big CHAP 
                   8.7 
                   (2.9) 
                 
                   F1 
                   CHAP-D 
                   Big CHAP, deoxy 
                   4.2 
                   (1.4) 
                 
                   F2 
                   OHES 
                   Octyl-2-hydroxyethyl-sulfoxide 
                   48.4 
                   (24.2) 
                 
                   F3 
                   RDHPOS 
                   Rac-2,3-dihydroxypropyloctylsulfoxide 
                   48.4 
                   (24.2) 
                 
                   F4 
                   GX-100 
                   Genapol ® X-100 
                   7.5 
                   (0.15) 
                 
                   F5 
                   HTG 
                   n-Heptyl-β-D-thioglucopyranoside 
                   58 
                   (29) 
                 
                   F6 
                   OG 
                   n-Octyl-β-D-glucopyranoside 
                   36 
                   (18) 
                 
                   F7 
                   NG 
                   n-Nonyl-β-D-glucopyranoside 
                   16.25 
                   (6.5) 
                 
                   F8 
                   CYGLU-3 
                   CYGLU ®-3 
                   56 
                   (28) 
                 
                   F9 
                   HECAMEG 
                   HECAMEG 
                   39 
                   (19.5) 
                 
                   F10 
                   HEGA-9 
                   Hega ®-9 
                   78 
                   (39) 
                 
                   F11 
                   C-HEGA-10 
                   C-Hega ®-10 
                   70 
                   (35) 
                 
                   F12 
                   C-HEGA-11 
                   C-Hega ®-11 
                   23 
                   (11.5) 
                 
                   G1 
                   CYMAL-3 
                   CYMAL ®-3 
                   60 
                   (30) 
                 
                   G2 
                   CYMAL-4 
                   CYMAL ®-4 
                   19 
                   (7.6) 
                 
                   G3 
                   CYMAL-5 
                   CYMAL ®-5 
                   7.2 
                   (2.4) 
                 
                   G4 
                   CYMAL-6 
                   CYMAL ®-6 
                   5.6 
                   (0.56) 
                 
                   G5 
                   CYMAL-7 
                   CYMAL ®-7 
                   9.5 
                   (0.19) 
                 
                   G6 
                   DMHM 
                   2,6-Dimethyl-4-heptyl-β-D-maltoside 
                   55 
                   (27.5) 
                 
                   G7 
                   OM 
                   n-Octyl-β-D-maltopyranoside 
                   39 
                   (19.5) 
                 
                   G8 
                   NM 
                   n-Nonyl-β-D-maltopyranoside 
                   15 
                   (6) 
                 
                   G9 
                   DαM 
                   n-Decyl-α-D-maltopyranoside 
                   4.8 
                   (1.6) 
                 
                   G10 
                   DM 
                   n-Decyl-β-D-maltopyranoside 
                   5.4 
                   (1.8) 
                 
                   G11 
                   UDαM 
                   n-Undecyl-α-D-maltopyranoside 
                   5.8 
                   (0.58) 
                 
                   G12 
                   UDM 
                   n-Undecyl-β-D-maltopyranoside 
                   5.9 
                   (0.59) 
                 
                   H1 
                   ωUDM 
                   ω-Undecylenyl-β-D-maltopyranoside 
                   3.6 
                   (1.2) 
                 
                   H2 
                   DDαM 
                   n-Dodecyl-α-D-maltopyranoside 
                   7.5 
                   (0.15) 
                 
                   H3 
                   DDM 
                   n-Dodecyl-β-D-maltopyranoside 
                   8.5 
                   (0.17) 
                 
                   H4 
                   TDM 
                   n-Tridecyl-β-D-maltopyranoside 
                   1.5 
                   (0.03) 
                 
                   H5 
                   OTM 
                   n-Octyl-β-D-thiomaltopyranoside 
                   21.25 
                   (8.5) 
                 
                   H6 
                   NTM 
                   n-Nonyl-β-D-thiomaltopyranoside 
                   9.6 
                   (3.2) 
                 
                   H7 
                   DTM 
                   n-Decyl-β-D-thiomaltopyranoside 
                   9 
                   (0.9) 
                 
                   H8 
                   UDTM 
                   n-Undecyl-β-D-thiomaltopyranoside 
                   10.5 
                   (0.21) 
                 
                   H9 
                   DDTM 
                   n-Dodecyl-β-D-thiomaltopyranoside 
                   5 
                   (0.05) 
                 
                   H10 
                   S-8 
                   Sucrose8 
                   48.8 
                   (24.4) 
                 
                   H11 
                   S-10 
                   Sucrose10 
                   7.5 
                   (2.5) 
                 
                   H12 
                   S-12 
                   Sucrose12 
                   15 
                   (0.3) 
                 
                     
                 
             
                
                
                
               
               
                
               
            
             
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
               
            
           
         
       
     
     
         17 . The method of  claim 1 , wherein said solution comprising said protein in a first detergent comprises about 1000 micrograms or less of said protein. 
     
     
         18 . The method of  claim 1 , wherein said solution comprising said protein in a first detergent comprises about 500 micrograms or less of said protein. 
     
     
         19 . The method of  claim 1 , wherein said solution comprising said protein in a first detergent comprises about 400 micrograms or less of said protein. 
     
     
         20 . The method of  claim 1 , wherein said solution comprising said protein in a first detergent comprises about 200 micrograms or less of said protein. 
     
     
         21 . The method of  claim 1 , wherein said solution comprising said protein in a first detergent comprises about 100 micrograms or less of said protein. 
     
     
         22 . The method of  claim 1 , wherein said solution comprising said protein in a first detergent comprises about 50 micrograms or less of said protein. 
     
     
         23 . The method of  claim 1 , wherein said method is performed in less than about two hours. 
     
     
         24 . The method of  claim 1 , wherein said method is performed in less than about 1 hour. 
     
     
         25 . The method of  claim 1 , wherein said protein amounts are determined by dot blot or Western blot analysis. 
     
     
         26 . The method of  claim 25 , wherein said protein amounts determined from the high molecular weight cut-off dot blots are normalized and plotted with the ratio of low:high normalized intensities and the values grouped into quartiles. 
     
     
         27 . The method of  claim 25 , wherein said protein amounts determined from the high molecular weight cut-off dot blots are normalized and plotted graphically on the abscissa while the ratio of low:high normalized intensities are plotted on the ordinate. 
     
     
         28 . The method of  claim 1 , further wherein said method is used to screen detergent mixtures, additives, ionic strength, and pH. 
     
     
         29 . The method of  claim 1 , wherein said protein is a membrane protein. 
     
     
         30 . The method of  claim 1 , wherein the concentration of said different detergent is the critical micelle concentration of said different detergent. 
     
     
         31 . The method of  claim 30 , wherein the critical micelle concentration of said different detergent is selected from the following table: 
       
         
           
                 
                 
                 
                 
               
                     
                 
                   Well 
                   Abbrev. 
                   Name 
                   [Det] mM 
                 
                     
                 
                     
                 
                 
                 
                 
                 
                 
               
                   A1 
                     
                   No detergent (−control) 
                     
                     
                 
                   A2 
                     
                   Empty well for current detergent (+control) 
                 
                   A3 
                   Z3-12 
                   ZWITTERGENT ® 3-12 
                   8.4 
                   (2.8) 
                 
                   A4 
                   Z3-14 
                   ZWITTERGENT ® 3-14 
                   10 
                   (0.2) 
                 
                   A5 
                   DMG 
                   n-Decyl-N,N-dimethylglycine 
                   38 
                   (19) 
                 
                   A6 
                   DOMG 
                   n-Dodecyl-N,N-dimethylglycine 
                   4.5 
                   (1.5) 
                 
                   A7 
                   DAO 
                   n-Decyl-N,N-dimethylamine-N-oxide 
                   21 
                   (10.5) 
                 
                   A8 
                   UDAO 
                   n-Undecyl-N,N,-dimethylamine-N-oxide 
                   9.6 
                   (3.2) 
                 
                   A9 
                   LDAO 
                   n-Dodecyl-N,N-dimethylamine-N-oxide 
                   3 
                   (1) 
                 
                   A10 
                   C-DDFOS 
                   C-DODECAFOS ™ 
                   44 
                   (22) 
                 
                   A11 
                   CF-4 
                   CYCLOFOS ™-4 
                   28 
                   (14) 
                 
                   A12 
                   CF-5 
                   CYCLOFOS ™-5 
                   13.5 
                   (4.5) 
                 
                   B1 
                   CF-6 
                   CYCLOFOS ™-6 
                   8.04 
                   (2.68) 
                 
                   B2 
                   CF-7 
                   CYCLOFOS ™-7 
                   6.2 
                   (0.62) 
                 
                   B3 
                   FC-10 
                   FOS-CHOLINE ®-10 
                   22 
                   (11) 
                 
                   B4 
                   FC-11 
                   FOS-CHOLINE ®-11 
                   5.55 
                   (1.85) 
                 
                   B5 
                   FC-12 
                   FOS-CHOLINE ®-12 
                   4.5 
                   (1.5) 
                 
                   B6 
                   FC-13 
                   FOS-CHOLINE ®-13 
                   7.5 
                   (0.75) 
                 
                   B7 
                   FC-14 
                   FOS-CHOLINE ®-14 
                   6 
                   (0.12) 
                 
                   B8 
                   FC-I11 
                   FOS-CHOLINE ®-ISO-11 
                   53.2 
                   (26.6) 
                 
                   B9 
                   FC-I11-6U 
                   FOS-CHOLINE ®-ISO-11-6U 
                   51.6 
                   (25.8) 
                 
                   B10 
                   FC-I9 
                   FOS-CHOLINE ®-ISO-9 
                   64 
                   (32) 
                 
                   B11 
                   FC-U10-11 
                   FOS-CHOLINE ®-UNSAT-11-10 
                   15.5 
                   (6.2) 
                 
                   B12 
                   DHPC 
                   
                     1,2-Diheptanoyl-sn-glycero-3-phosphocholine 
                   
                   4.2 
                   (1.4) 
                 
                   C1 
                   LPC-10 
                   LysoPC-10 
                   20 
                   (8) 
                 
                   C2 
                   LPC-12 
                   LysoPC-12 
                   7 
                   (0.7) 
                 
                   C3 
                   FOSFEN-9 
                   FOSFEN ™-9 
                   4.05 
                   (1.35) 
                 
                   C4 
                   CHAPS 
                   CHAPS 
                   20 
                   (8) 
                 
                   C5 
                   CHAPSO 
                   CHAPSO 
                   20 
                   (8) 
                 
                   C6 
                   DDMAU 
                   n-Dodecyl-N,N-(dimethylammonio)undecanoate 
                   6.5 
                   (0.13) 
                 
                   C7 
                   DDMAB 
                   n-Dodecyl-N,N-(dimethylammonio)butyrate 
                   12.9 
                   (4.3) 
                 
                   C8 
                   LAPAO 
                   LAPAO 
                   4.8 
                   (1.6) 
                 
                   C9 
                   TRIPAO 
                   TRIPAO 
                   13.5 
                   (4.5) 
                 
                   C10 
                   T-20 
                   TWEEN ® 20 
                   5.9 
                   (0.059) 
                 
                   C11 
                   BRIJ-35 
                   BRIJ ® 35 
                   9.1 
                   (0.091) 
                 
                   C12 
                   TX-100 
                   TRITON ® X-100 
                   11.5 
                   (0.23) 
                 
                   D1 
                   TX-114 
                   TRITON ® X-114 
                   10 
                   (0.2) 
                 
                   D2 
                   TX-305 
                   TRITON ® X-305 
                   6.5 
                   (0.65) 
                 
                   D3 
                   TX-405 
                   TRITON ® X-405 
                   8.1 
                   (0.81) 
                 
                   D4 
                   NID-P40 
                   [Octylphenoxy]polyethoxyethanol 
                   15 
                   (0.3) 
                 
                   D5 
                   APO8 
                   Dimethyloctylphosphine oxide 
                   80 
                   (40) 
                 
                   D6 
                   APO9 
                   Dimethylnonylphosphine oxide 
                   20 
                   (10) 
                 
                   D7 
                   APO10 
                   Dimethyldecylphosphine oxide 
                   13.98 
                   (4.66) 
                 
                   D8 
                   APO11 
                   Dimethylundecylphosphine oxide 
                   3.6 
                   (1.2) 
                 
                   D9 
                   APO12 
                   Dimethyldodecylphosphine oxide 
                   5.7 
                   (0.57) 
                 
                   D10 
                   C6E3 
                   Triethylene glycol monohexyl ether 
                   46 
                   (23) 
                 
                   D11 
                   C6E4 
                   Tetraethylene glycol monohexyl ether 
                   60 
                   (30) 
                 
                   D12 
                   C6E5 
                   Pentaethylene glycol monohexyl ether 
                   74 
                   (37) 
                 
                   E1 
                   C7E5 
                   Pentaethylene glycol monoheptyl ether 
                   42 
                   (21) 
                 
                   E2 
                   C8E4 
                   Tetraethylene glycol monooctyl ether 
                   20 
                   (8) 
                 
                   E3 
                   C8E5 
                   Pentaethylene glycol monooctyl ether 
                   17.75 
                   (7.1) 
                 
                   E4 
                   C8E6 
                   Hexaethylene glycol monooctyl ether 
                   25 
                   (10) 
                 
                   E5 
                   C10E5 
                   Pentaethylene glycol monodecyl ether 
                   8.1 
                   (0.81) 
                 
                   E6 
                   C10E6 
                   Hexaethylene glycol monodecyl ether 
                   9 
                   (0.9) 
                 
                   E7 
                   C10E9 
                   Polyoxyethylene(9)decyl ether 
                   3.9 
                   (1.3) 
                 
                   E8 
                   C12E8 
                   Octaethylene glycol monododecyl ether 
                   9 
                   (0.09) 
                 
                   E9 
                   C12E9 
                   Polyoxyethylene(9)dodecyl ether 
                   5 
                   (0.05) 
                 
                   E10 
                   C12E10 
                   Polyoxyethylene(10)dodecyl ether 
                   10 
                   (0.2) 
                 
                   E11 
                   C13E8 
                   Polyoxyethylene(8)tridecyl ether 
                   10 
                   (0.1) 
                 
                   E12 
                   CHAP 
                   Big CHAP 
                   8.7 
                   (2.9) 
                 
                   F1 
                   CHAP-D 
                   Big CHAP, deoxy 
                   4.2 
                   (1.4) 
                 
                   F2 
                   OHES 
                   Octyl-2-hydroxyethyl-sulfoxide 
                   48.4 
                   (24.2) 
                 
                   F3 
                   RDHPOS 
                   Rac-2,3-dihydroxypropyloctylsulfoxide 
                   48.4 
                   (24.2) 
                 
                   F4 
                   GX-100 
                   Genapol ® X-100 
                   7.5 
                   (0.15) 
                 
                   F5 
                   HTG 
                   n-Heptyl-β-D-thioglucopyranoside 
                   58 
                   (29) 
                 
                   F6 
                   OG 
                   n-Octyl-β-D-glucopyranoside 
                   36 
                   (18) 
                 
                   F7 
                   NG 
                   n-Nonyl-β-D-glucopyranoside 
                   16.25 
                   (6.5) 
                 
                   F8 
                   CYGLU-3 
                   CYGLU ®-3 
                   56 
                   (28) 
                 
                   F9 
                   HECAMEG 
                   HECAMEG 
                   39 
                   (19.5) 
                 
                   F10 
                   HEGA-9 
                   Hega ®-9 
                   78 
                   (39) 
                 
                   F11 
                   C-HEGA-10 
                   C-Hega ®-10 
                   70 
                   (35) 
                 
                   F12 
                   C-HEGA-11 
                   C-Hega ®-11 
                   23 
                   (11.5) 
                 
                   G1 
                   CYMAL-3 
                   CYMAL ®-3 
                   60 
                   (30) 
                 
                   G2 
                   CYMAL-4 
                   CYMAL ®-4 
                   19 
                   (7.6) 
                 
                   G3 
                   CYMAL-5 
                   CYMAL ®-5 
                   7.2 
                   (2.4) 
                 
                   G4 
                   CYMAL-6 
                   CYMAL ®-6 
                   5.6 
                   (0.56) 
                 
                   G5 
                   CYMAL-7 
                   CYMAL ®-7 
                   9.5 
                   (0.19) 
                 
                   G6 
                   DMHM 
                   2,6-Dimethyl-4-heptyl-β-D-maltoside 
                   55 
                   (27.5) 
                 
                   G7 
                   OM 
                   n-Octyl-β-D-maltopyranoside 
                   39 
                   (19.5) 
                 
                   G8 
                   NM 
                   n-Nonyl-β-D-maltopyranoside 
                   15 
                   (6) 
                 
                   G9 
                   DαM 
                   n-Decyl-α-D-maltopyranoside 
                   4.8 
                   (1.6) 
                 
                   G10 
                   DM 
                   n-Decyl-β-D-maltopyranoside 
                   5.4 
                   (1.8) 
                 
                   G11 
                   UDαM 
                   n-Undecyl-α-D-maltopyranoside 
                   5.8 
                   (0.58) 
                 
                   G12 
                   UDM 
                   n-Undecyl-β-D-maltopyranoside 
                   5.9 
                   (0.59) 
                 
                   H1 
                   ωUDM 
                   ω-Undecylenyl-β-D-maltopyranoside 
                   3.6 
                   (1.2) 
                 
                   H2 
                   DDαM 
                   n-Dodecyl-α-D-maltopyranoside 
                   7.5 
                   (0.15) 
                 
                   H3 
                   DDM 
                   n-Dodecyl-β-D-maltopyranoside 
                   8.5 
                   (0.17) 
                 
                   H4 
                   TDM 
                   n-Tridecyl-β-D-maltopyranoside 
                   1.5 
                   (0.03) 
                 
                   H5 
                   OTM 
                   n-Octyl-β-D-thiomaltopyranoside 
                   21.25 
                   (8.5) 
                 
                   H6 
                   NTM 
                   n-Nonyl-β-D-thiomaltopyranoside 
                   9.6 
                   (3.2) 
                 
                   H7 
                   DTM 
                   n-Decyl-β-D-thiomaltopyranoside 
                   9 
                   (0.9) 
                 
                   H8 
                   UDTM 
                   n-Undecyl-β-D-thiomaltopyranoside 
                   10.5 
                   (0.21) 
                 
                   H9 
                   DDTM 
                   n-Dodecyl-β-D-thiomaltopyranoside 
                   5 
                   (0.05) 
                 
                   H10 
                   S-8 
                   Sucrose8 
                   48.8 
                   (24.4) 
                 
                   H11 
                   S-10 
                   Sucrose10 
                   7.5 
                   (2.5) 
                 
                   H12 
                   S-12 
                   Sucrose12 
                   15 
                   (0.3) 
                 
                     
                 
             
                
                
                
               
               
                
               
            
             
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
               
            
           
         
       
     
     
         32 . The method of  claim 1 , wherein said different detergent has moderate or high aqueous solubility. 
     
     
         33 . The method of  claim 1 , wherein said different detergent has zwitterionic or nonionic headgroups. 
     
     
         34 . A detergent panel for determining the stability and size of a protein, said panel comprising at least two detergents at or above their critical micelle concentrations, and optionally a positive control and a negative control, wherein said detergents and their critical micelle concentrations, or suitably higher concentrations, are selected from the following table: 
       
         
           
                 
                 
                 
                 
               
                     
                 
                   Well 
                   Abbrev. 
                   Name 
                   [Det] mM 
                 
                     
                 
                     
                 
                 
                 
                 
                 
                 
               
                   A1 
                     
                   No detergent (−control) 
                     
                     
                 
                   A2 
                     
                   Empty well for current detergent (+control) 
                 
                   A3 
                   Z3-12 
                   ZWITTERGENT ® 3-12 
                   8.4 
                   (2.8) 
                 
                   A4 
                   Z3-14 
                   ZWITTERGENT ® 3-14 
                   10 
                   (0.2) 
                 
                   A5 
                   DMG 
                   n-Decyl-N,N-dimethylglycine 
                   38 
                   (19) 
                 
                   A6 
                   DOMG 
                   n-Dodecyl-N,N-dimethylglycine 
                   4.5 
                   (1.5) 
                 
                   A7 
                   DAO 
                   n-Decyl-N,N-dimethylamine-N-oxide 
                   21 
                   (10.5) 
                 
                   A8 
                   UDAO 
                   n-Undecyl-N,N,-dimethylamine-N-oxide 
                   9.6 
                   (3.2) 
                 
                   A9 
                   LDAO 
                   n-Dodecyl-N,N-dimethylamine-N-oxide 
                   3 
                   (1) 
                 
                   A10 
                   C-DDFOS 
                   C-DODECAFOS ™ 
                   44 
                   (22) 
                 
                   A11 
                   CF-4 
                   CYCLOFOS ™-4 
                   28 
                   (14) 
                 
                   A12 
                   CF-5 
                   CYCLOFOS ™-5 
                   13.5 
                   (4.5) 
                 
                   B1 
                   CF-6 
                   CYCLOFOS ™-6 
                   8.04 
                   (2.68) 
                 
                   B2 
                   CF-7 
                   CYCLOFOS ™-7 
                   6.2 
                   (0.62) 
                 
                   B3 
                   FC-10 
                   FOS-CHOLINE ®-10 
                   22 
                   (11) 
                 
                   B4 
                   FC-11 
                   FOS-CHOLINE ®-11 
                   5.55 
                   (1.85) 
                 
                   B5 
                   FC-12 
                   FOS-CHOLINE ®-12 
                   4.5 
                   (1.5) 
                 
                   B6 
                   FC-13 
                   FOS-CHOLINE ®-13 
                   7.5 
                   (0.75) 
                 
                   B7 
                   FC-14 
                   FOS-CHOLINE ®-14 
                   6 
                   (0.12) 
                 
                   B8 
                   FC-I11 
                   FOS-CHOLINE ®-ISO-11 
                   53.2 
                   (26.6) 
                 
                   B9 
                   FC-I11-6U 
                   FOS-CHOLINE ®-ISO-11-6U 
                   51.6 
                   (25.8) 
                 
                   B10 
                   FC-I9 
                   FOS-CHOLINE ®-ISO-9 
                   64 
                   (32) 
                 
                   B11 
                   FC-U10-11 
                   FOS-CHOLINE ®-UNSAT-11-10 
                   15.5 
                   (6.2) 
                 
                   B12 
                   DHPC 
                   
                     1,2-Diheptanoyl-sn-glycero-3-phosphocholine 
                   
                   4.2 
                   (1.4) 
                 
                   C1 
                   LPC-10 
                   LysoPC-10 
                   20 
                   (8) 
                 
                   C2 
                   LPC-12 
                   LysoPC-12 
                   7 
                   (0.7) 
                 
                   C3 
                   FOSFEN-9 
                   FOSFEN ™-9 
                   4.05 
                   (1.35) 
                 
                   C4 
                   CHAPS 
                   CHAPS 
                   20 
                   (8) 
                 
                   C5 
                   CHAPSO 
                   CHAPSO 
                   20 
                   (8) 
                 
                   C6 
                   DDMAU 
                   n-Dodecyl-N,N-(dimethylammonio)undecanoate 
                   6.5 
                   (0.13) 
                 
                   C7 
                   DDMAB 
                   n-Dodecyl-N,N-(dimethylammonio)butyrate 
                   12.9 
                   (4.3) 
                 
                   C8 
                   LAPAO 
                   LAPAO 
                   4.8 
                   (1.6) 
                 
                   C9 
                   TRIPAO 
                   TRIPAO 
                   13.5 
                   (4.5) 
                 
                   C10 
                   T-20 
                   TWEEN ® 20 
                   5.9 
                   (0.059) 
                 
                   C11 
                   BRIJ-35 
                   BRIJ ®35 
                   9.1 
                   (0.091) 
                 
                   C12 
                   TX-100 
                   TRITON ® X-100 
                   11.5 
                   (0.23) 
                 
                   D1 
                   TX-114 
                   TRITON ® X-114 
                   10 
                   (0.2) 
                 
                   D2 
                   TX-305 
                   TRITON ® X-305 
                   6.5 
                   (0.65) 
                 
                   D3 
                   TX-405 
                   TRITON ® X-405 
                   8.1 
                   (0.81) 
                 
                   D4 
                   NID-P40 
                   [Octylphenoxy]polyethoxyethanol 
                   15 
                   (0.3) 
                 
                   D5 
                   APO8 
                   Dimethyloctylphosphine oxide 
                   80 
                   (40) 
                 
                   D6 
                   APO9 
                   Dimethylnonylphosphine oxide 
                   20 
                   (10) 
                 
                   D7 
                   APO10 
                   Dimethyldecylphosphine oxide 
                   13.98 
                   (4.66) 
                 
                   D8 
                   APO11 
                   Dimethylundecylphosphine oxide 
                   3.6 
                   (1.2) 
                 
                   D9 
                   APO12 
                   Dimethyldodecylphosphine oxide 
                   5.7 
                   (0.57) 
                 
                   D10 
                   C6E3 
                   Triethylene glycol monohexyl ether 
                   46 
                   (23) 
                 
                   D11 
                   C6E4 
                   Tetraethylene glycol monohexyl ether 
                   60 
                   (30) 
                 
                   D12 
                   C6E5 
                   Pentaethylene glycol monohexyl ether 
                   74 
                   (37) 
                 
                   E1 
                   C7E5 
                   Pentaethylene glycol monoheptyl ether 
                   42 
                   (21) 
                 
                   E2 
                   C8E4 
                   Tetraethylene glycol monooctyl ether 
                   20 
                   (8) 
                 
                   E3 
                   C8E5 
                   Pentaethylene glycol monooctyl ether 
                   17.75 
                   (7.1) 
                 
                   E4 
                   C8E6 
                   Hexaethylene glycol monooctyl ether 
                   25 
                   (10) 
                 
                   E5 
                   C10E5 
                   Pentaethylene glycol monodecyl ether 
                   8.1 
                   (0.81) 
                 
                   E6 
                   C10E6 
                   Hexaethylene glycol monodecyl ether 
                   9 
                   (0.9) 
                 
                   E7 
                   C10E9 
                   Polyoxyethylene(9)decyl ether 
                   3.9 
                   (1.3) 
                 
                   E8 
                   C12E8 
                   Octaethylene glycol monododecyl ether 
                   9 
                   (0.09) 
                 
                   E9 
                   C12E9 
                   Polyoxyethylene(9)dodecyl ether 
                   5 
                   (0.05) 
                 
                   E10 
                   C12E10 
                   Polyoxyethylene(10)dodecyl ether 
                   10 
                   (0.2) 
                 
                   E11 
                   C13E8 
                   Polyoxyethylene(8)tridecyl ether 
                   10 
                   (0.1) 
                 
                   E12 
                   CHAP 
                   Big CHAP 
                   8.7 
                   (2.9) 
                 
                   F1 
                   CHAP-D 
                   Big CHAP, deoxy 
                   4.2 
                   (1.4) 
                 
                   F2 
                   OHES 
                   Octyl-2-hydroxyethyl-sulfoxide 
                   48.4 
                   (24.2) 
                 
                   F3 
                   RDHPOS 
                   Rac-2,3-dihydroxypropyloctylsulfoxide 
                   48.4 
                   (24.2) 
                 
                   F4 
                   GX-100 
                   Genapol ® X-100 
                   7.5 
                   (0.15) 
                 
                   F5 
                   HTG 
                   n-Heptyl-β-D-thioglucopyranoside 
                   58 
                   (29) 
                 
                   F6 
                   OG 
                   n-Octyl-β-D-glucopyranoside 
                   36 
                   (18) 
                 
                   F7 
                   NG 
                   n-Nonyl-β-D-glucopyranoside 
                   16.25 
                   (6.5) 
                 
                   F8 
                   CYGLU-3 
                   CYGLU ®-3 
                   56 
                   (28) 
                 
                   F9 
                   HECAMEG 
                   HECAMEG 
                   39 
                   (19.5) 
                 
                   F10 
                   HEGA-9 
                   Hega ®-9 
                   78 
                   (39) 
                 
                   F11 
                   C-HEGA-10 
                   C-Hega ®-10 
                   70 
                   (35) 
                 
                   F12 
                   C-HEGA-11 
                   C-Hega ®-11 
                   23 
                   (11.5) 
                 
                   G1 
                   CYMAL-3 
                   CYMAL ®-3 
                   60 
                   (30) 
                 
                   G2 
                   CYMAL-4 
                   CYMAL ®-4 
                   19 
                   (7.6) 
                 
                   G3 
                   CYMAL-5 
                   CYMAL ®-5 
                   7.2 
                   (2.4) 
                 
                   G4 
                   CYMAL-6 
                   CYMAL ®-6 
                   5.6 
                   (0.56) 
                 
                   G5 
                   CYMAL-7 
                   CYMAL ®-7 
                   9.5 
                   (0.19) 
                 
                   G6 
                   DMHM 
                   2,6-Dimethyl-4-heptyl-β-D-maltoside 
                   55 
                   (27.5) 
                 
                   G7 
                   OM 
                   n-Octyl-β-D-maltopyranoside 
                   39 
                   (19.5) 
                 
                   G8 
                   NM 
                   n-Nonyl-β-D-maltopyranoside 
                   15 
                   (6) 
                 
                   G9 
                   DαM 
                   n-Decyl-α-D-maltopyranoside 
                   4.8 
                   (1.6) 
                 
                   G10 
                   DM 
                   n-Decyl-β-D-maltopyranoside 
                   5.4 
                   (1.8) 
                 
                   G11 
                   UDαM 
                   n-Undecyl-α-D-maltopyranoside 
                   5.8 
                   (0.58) 
                 
                   G12 
                   UDM 
                   n-Undecyl-β-D-maltopyranoside 
                   5.9 
                   (0.59) 
                 
                   H1 
                   ωUDM 
                   ω-Undecylenyl-β-D-maltopyranoside 
                   3.6 
                   (1.2) 
                 
                   H2 
                   DDαM 
                   n-Dodecyl-α-D-maltopyranoside 
                   7.5 
                   (0.15) 
                 
                   H3 
                   DDM 
                   n-Dodecyl-β-D-maltopyranoside 
                   8.5 
                   (0.17) 
                 
                   H4 
                   TDM 
                   n-Tridecyl-β-D-maltopyranoside 
                   1.5 
                   (0.03) 
                 
                   H5 
                   OTM 
                   n-Octyl-β-D-thiomaltopyranoside 
                   21.25 
                   (8.5) 
                 
                   H6 
                   NTM 
                   n-Nonyl-β-D-thiomaltopyranoside 
                   9.6 
                   (3.2) 
                 
                   H7 
                   DTM 
                   n-Decyl-β-D-thiomaltopyranoside 
                   9 
                   (0.9) 
                 
                   H8 
                   UDTM 
                   n-Undecyl-β-D-thiomaltopyranoside 
                   10.5 
                   (0.21) 
                 
                   H9 
                   DDTM 
                   n-Dodecyl-β-D-thiomaltopyranoside 
                   5 
                   (0.05) 
                 
                   H10 
                   S-8 
                   Sucrose8 
                   48.8 
                   (24.4) 
                 
                   H11 
                   S-10 
                   Sucrose10 
                   7.5 
                   (2.5) 
                 
                   H12 
                   S-12 
                   Sucrose12 
                   15 
                   (0.3) 
                 
                     
                 
             
                
                
                
               
               
                
               
            
             
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
               
            
           
         
       
     
     
         35 . The detergent panel of  claim 34 , wherein all 96 detergents and controls are used. 
     
     
         36 . A kit for determining the stability and size of a protein, said kit comprising at least one detergent, at least one chamber wherein said chamber comprises a filter of about 0.2 μm pore size, at least one chamber comprising a high molecular weight cut-off filter, at least one chamber comprising a low molecular weight cut-off filter, optionally at least one standard protein, and an instructional material for the used thereof. 
     
     
         37 . The kit of  claim 36 , wherein said chambers are wells in 96 well plates, said high molecular weight cut-off filter is about 300 kDa, and said low molecular weight cut-off filter is about 100 kDa. 
     
     
         38 . The kit of  claim 36 , further comprising at least one detergent or control selected from the following table: 
       
         
           
                 
                 
                 
                 
               
                     
                 
                   Well 
                   Abbrev. 
                   Name 
                   [Det] mM 
                 
                     
                 
                     
                 
                 
                 
                 
                 
                 
               
                   A1 
                     
                   No detergent (−control) 
                     
                     
                 
                   A2 
                     
                   Empty well for current detergent (+control) 
                 
                   A3 
                   Z3-12 
                   ZWITTERGENT ® 3-12 
                   8.4 
                   (2.8) 
                 
                   A4 
                   Z3-14 
                   ZWITTERGENT ® 3-14 
                   10 
                   (0.2) 
                 
                   A5 
                   DMG 
                   n-Decyl-N,N-dimethylglycine 
                   38 
                   (19) 
                 
                   A6 
                   DOMG 
                   n-Dodecyl-N,N-dimethylglycine 
                   4.5 
                   (1.5) 
                 
                   A7 
                   DAO 
                   n-Decyl-N,N-dimethylamine-N-oxide 
                   21 
                   (10.5) 
                 
                   A8 
                   UDAO 
                   n-Undecyl-N,N,-dimethylamine-N-oxide 
                   9.6 
                   (3.2) 
                 
                   A9 
                   LDAO 
                   n-Dodecyl-N,N-dimethylamine-N-oxide 
                   3 
                   (1) 
                 
                   A10 
                   C-DDFOS 
                   C-DODECAFOS ™ 
                   44 
                   (22) 
                 
                   A11 
                   CF-4 
                   CYCLOFOS ™-4 
                   28 
                   (14) 
                 
                   A12 
                   CF-5 
                   CYCLOFOS ™-5 
                   13.5 
                   (4.5) 
                 
                   B1 
                   CF-6 
                   CYCLOFOS ™-6 
                   8.04 
                   (2.68) 
                 
                   B2 
                   CF-7 
                   CYCLOFOS ™-7 
                   6.2 
                   (0.62) 
                 
                   B3 
                   FC-10 
                   FOS-CHOLINE ®-10 
                   22 
                   (11) 
                 
                   B4 
                   FC-11 
                   FOS-CHOLINE ®-11 
                   5.55 
                   (1.85) 
                 
                   B5 
                   FC-12 
                   FOS-CHOLINE ®-12 
                   4.5 
                   (1.5) 
                 
                   B6 
                   FC-13 
                   FOS-CHOLINE ®-13 
                   7.5 
                   (0.75) 
                 
                   B7 
                   FC-14 
                   FOS-CHOLINE ®-14 
                   6 
                   (0.12) 
                 
                   B8 
                   FC-I11 
                   FOS-CHOLINE ®-ISO-11 
                   53.2 
                   (26.6) 
                 
                   B9 
                   FC-I11-6U 
                   FOS-CHOLINE ®-ISO-11-6U 
                   51.6 
                   (25.8) 
                 
                   B10 
                   FC-I9 
                   FOS-CHOLINE ®-ISO-9 
                   64 
                   (32) 
                 
                   B11 
                   FC-U10-11 
                   FOS-CHOLINE ®-UNSAT-11-10 
                   15.5 
                   (6.2) 
                 
                   B12 
                   DHPC 
                   
                     1,2-Diheptanoyl-sn-glycero-3-phosphocholine 
                   
                   4.2 
                   (1.4) 
                 
                   C1 
                   LPC-10 
                   LysoPC-10 
                   20 
                   (8) 
                 
                   C2 
                   LPC-12 
                   LysoPC-12 
                   7 
                   (0.7) 
                 
                   C3 
                   FOSFEN-9 
                   FOSFEN ™-9 
                   4.05 
                   (1.35) 
                 
                   C4 
                   CHAPS 
                   CHAPS 
                   20 
                   (8) 
                 
                   C5 
                   CHAPSO 
                   CHAPSO 
                   20 
                   (8) 
                 
                   C6 
                   DDMAU 
                   n-Dodecyl-N,N-(dimethylammonio)undecanoate 
                   6.5 
                   (0.13) 
                 
                   C7 
                   DDMAB 
                   n-Dodecyl-N,N-(dimethylammonio)butyrate 
                   12.9 
                   (4.3) 
                 
                   C8 
                   LAPAO 
                   LAPAO 
                   4.8 
                   (1.6) 
                 
                   C9 
                   TRIPAO 
                   TRIPAO 
                   13.5 
                   (4.5) 
                 
                   C10 
                   T-20 
                   TWEEN ® 20 
                   5.9 
                   (0.059) 
                 
                   C11 
                   BRIJ-35 
                   BRIJ ®35 
                   9.1 
                   (0.091) 
                 
                   C12 
                   TX-100 
                   TRITON ® X-100 
                   11.5 
                   (0.23) 
                 
                   D1 
                   TX-114 
                   TRITON ® X-114 
                   10 
                   (0.2) 
                 
                   D2 
                   TX-305 
                   TRITON ® X-305 
                   6.5 
                   (0.65) 
                 
                   D3 
                   TX-405 
                   TRITON ® X-405 
                   8.1 
                   (0.81) 
                 
                   D4 
                   NID-P40 
                   [Octylphenoxy]polyethoxyethanol 
                   15 
                   (0.3) 
                 
                   D5 
                   APO8 
                   Dimethyloctylphosphine oxide 
                   80 
                   (40) 
                 
                   D6 
                   APO9 
                   Dimethylnonylphosphine oxide 
                   20 
                   (10) 
                 
                   D7 
                   APO10 
                   Dimethyldecylphosphine oxide 
                   13.98 
                   (4.66) 
                 
                   D8 
                   APO11 
                   Dimethylundecylphosphine oxide 
                   3.6 
                   (1.2) 
                 
                   D9 
                   APO12 
                   Dimethyldodecylphosphine oxide 
                   5.7 
                   (0.57) 
                 
                   D10 
                   C6E3 
                   Triethylene glycol monohexyl ether 
                   46 
                   (23) 
                 
                   D11 
                   C6E4 
                   Tetraethylene glycol monohexyl ether 
                   60 
                   (30) 
                 
                   D12 
                   C6E5 
                   Pentaethylene glycol monohexyl ether 
                   74 
                   (37) 
                 
                   E1 
                   C7E5 
                   Pentaethylene glycol monoheptyl ether 
                   42 
                   (21) 
                 
                   E2 
                   C8E4 
                   Tetraethylene glycol monooctyl ether 
                   20 
                   (8) 
                 
                   E3 
                   C8E5 
                   Pentaethylene glycol monooctyl ether 
                   17.75 
                   (7.1) 
                 
                   E4 
                   C8E6 
                   Hexaethylene glycol monooctyl ether 
                   25 
                   (10) 
                 
                   E5 
                   C10E5 
                   Pentaethylene glycol monodecyl ether 
                   8.1 
                   (0.81) 
                 
                   E6 
                   C10E6 
                   Hexaethylene glycol monodecyl ether 
                   9 
                   (0.9) 
                 
                   E7 
                   C10E9 
                   Polyoxyethylene(9)decyl ether 
                   3.9 
                   (1.3) 
                 
                   E8 
                   C12E8 
                   Octaethylene glycol monododecyl ether 
                   9 
                   (0.09) 
                 
                   E9 
                   C12E9 
                   Polyoxyethylene(9)dodecyl ether 
                   5 
                   (0.05) 
                 
                   E10 
                   C12E10 
                   Polyoxyethylene(10)dodecyl ether 
                   10 
                   (0.2) 
                 
                   E11 
                   C13E8 
                   Polyoxyethylene(8)tridecyl ether 
                   10 
                   (0.1) 
                 
                   E12 
                   CHAP 
                   Big CHAP 
                   8.7 
                   (2.9) 
                 
                   F1 
                   CHAP-D 
                   Big CHAP, deoxy 
                   4.2 
                   (1.4) 
                 
                   F2 
                   OHES 
                   Octyl-2-hydroxyethyl-sulfoxide 
                   48.4 
                   (24.2) 
                 
                   F3 
                   RDHPOS 
                   Rac-2,3-dihydroxypropyloctylsulfoxide 
                   48.4 
                   (24.2) 
                 
                   F4 
                   GX-100 
                   Genapol ® X-100 
                   7.5 
                   (0.15) 
                 
                   F5 
                   HTG 
                   n-Heptyl-β-D-thioglucopyranoside 
                   58 
                   (29) 
                 
                   F6 
                   OG 
                   n-Octyl-β-D-glucopyranoside 
                   36 
                   (18) 
                 
                   F7 
                   NG 
                   n-Nonyl-β-D-glucopyranoside 
                   16.25 
                   (6.5) 
                 
                   F8 
                   CYGLU-3 
                   CYGLU ®-3 
                   56 
                   (28) 
                 
                   F9 
                   HECAMEG 
                   HECAMEG 
                   39 
                   (19.5) 
                 
                   F10 
                   HEGA-9 
                   Hega ®-9 
                   78 
                   (39) 
                 
                   F11 
                   C-HEGA-10 
                   C-Hega ®-10 
                   70 
                   (35) 
                 
                   F12 
                   C-HEGA-11 
                   C-Hega ®-11 
                   23 
                   (11.5) 
                 
                   G1 
                   CYMAL-3 
                   CYMAL ®-3 
                   60 
                   (30) 
                 
                   G2 
                   CYMAL-4 
                   CYMAL ®-4 
                   19 
                   (7.6) 
                 
                   G3 
                   CYMAL-5 
                   CYMAL ®-5 
                   7.2 
                   (2.4) 
                 
                   G4 
                   CYMAL-6 
                   CYMAL ®-6 
                   5.6 
                   (0.56) 
                 
                   G5 
                   CYMAL-7 
                   CYMAL ®-7 
                   9.5 
                   (0.19) 
                 
                   G6 
                   DMHM 
                   2,6-Dimethyl-4-heptyl-β-D-maltoside 
                   55 
                   (27.5) 
                 
                   G7 
                   OM 
                   n-Octyl-β-D-maltopyranoside 
                   39 
                   (19.5) 
                 
                   G8 
                   NM 
                   n-Nonyl-β-D-maltopyranoside 
                   15 
                   (6) 
                 
                   G9 
                   DαM 
                   n-Decyl-α-D-maltopyranoside 
                   4.8 
                   (1.6) 
                 
                   G10 
                   DM 
                   n-Decyl-β-D-maltopyranoside 
                   5.4 
                   (1.8) 
                 
                   G11 
                   UDαM 
                   n-Undecyl-α-D-maltopyranoside 
                   5.8 
                   (0.58) 
                 
                   G12 
                   UDM 
                   n-Undecyl-β-D-maltopyranoside 
                   5.9 
                   (0.59) 
                 
                   H1 
                   ωUDM 
                   ω-Undecylenyl-β-D-maltopyranoside 
                   3.6 
                   (1.2) 
                 
                   H2 
                   DDαM 
                   n-Dodecyl-α-D-maltopyranoside 
                   7.5 
                   (0.15) 
                 
                   H3 
                   DDM 
                   n-Dodecyl-β-D-maltopyranoside 
                   8.5 
                   (0.17) 
                 
                   H4 
                   TDM 
                   n-Tridecyl-β-D-maltopyranoside 
                   1.5 
                   (0.03) 
                 
                   H5 
                   OTM 
                   n-Octyl-β-D-thiomaltopyranoside 
                   21.25 
                   (8.5) 
                 
                   H6 
                   NTM 
                   n-Nonyl-β-D-thiomaltopyranoside 
                   9.6 
                   (3.2) 
                 
                   H7 
                   DTM 
                   n-Decyl-β-D-thiomaltopyranoside 
                   9 
                   (0.9) 
                 
                   H8 
                   UDTM 
                   n-Undecyl-β-D-thiomaltopyranoside 
                   10.5 
                   (0.21) 
                 
                   H9 
                   DDTM 
                   n-Dodecyl-β-D-thiomaltopyranoside 
                   5 
                   (0.05) 
                 
                   H10 
                   S-8 
                   Sucrose8 
                   48.8 
                   (24.4) 
                 
                   H11 
                   S-10 
                   Sucrose10 
                   7.5 
                   (2.5) 
                 
                   H12 
                   S-12 
                   Sucrose12 
                   15 
                   (0.3) 
                 
                     
                 
             
                
                
                
               
               
                
               
            
             
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
                
               
            
           
         
       
     
     
         39 . The kit of  claim 38 , wherein said kit comprises at least one test 96 well plate comprising all of the detergents and controls according to said table. 
     
     
         40 . The method of  claim 1 , wherein at least one of said first, second, or third chambers is subjected to centrifugation to enhance the filtration process.

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