Method for producing a gluten-free peptide preparation and preparation thus obtained

Abstract

The invention relates to method for producing a glutamine-rich gluten-free peptide preparation from gluten protein, comprising the steps of enzymatically hydrolysing wheat gluten using one or more proteases to obtain a hydrolysate acidifying the hydrolysate to a pH between 4 and 5; and filtering the hydrolysate to obtain the glutamine-rich gluten-free peptide preparation as the filtrate. The protease is preferably a neutral or basic protease and the optimum pH is from 4.5 to 4.7.

1 - 16 . (Cancelled).  
     
     
         17 . Method for producing a glutamine-rich gluten-free peptide preparation from gluten protein, comprising the steps of: 
 a) enzymatically hydrolysing gluten using one or more proteases to obtain a hydrolysate;    b) acidifying the hydrolysate to a pH between 4 and 5; and    c) filtering the hydrolysate to obtain the glutamine-rich gluten-free peptide preparation as the filtrate.    
     
     
         18 . The method as claimed in  claim 17 , wherein the proteases are alkaline or neutral proteases.  
     
     
         19 . The method as claimed in  claim 17 , wherein the pH is between 4.2 and 4.8.  
     
     
         20 . The method as claimed in  claim 17 , wherein the pH is between 4.5 and 4.7.  
     
     
         21 . The method as claimed in  claim 17 , wherein proteases are used that are active at a pH above 6.  
     
     
         22 . The method as claimed in  claim 17 , wherein between step b) and c) the enzymes are inactivated.  
     
     
         23 . The method as claimed in  claim 22 , wherein the enzymes are inactivated by means of heat.  
     
     
         24 . The method as claimed in  claim 17 , wherein the gluten is wheat gluten.  
     
     
         25 . A peptide preparation prepared from gluten protein, which is glutamine-rich and gluten-free and obtainable by a method as claimed in  claim 17 .  
     
     
         26 . The peptide preparation as claimed in  claim 25 , wherein the gluten from which the preparation is made is wheat gluten.  
     
     
         27 . The peptide preparation as claimed in  claim 25  for use as an ingredient in glutamine peptide tablets.  
     
     
         28 . The peptide preparation as claimed in  claim 25  for use as an ingredient in glutamine peptide liquid beverages.  
     
     
         29 . The peptide preparation as claimed in  claim 25  for use as an ingredient in glutamine peptide enteral nutrition.  
     
     
         30 . Glutamine peptide tablets comprising the usual carriers, diluents and excipients for tablets and a peptide preparation as claimed in  claim 25  as glutamine peptide source.  
     
     
         31 . A glutamine peptide liquid beverage comprising ingredients for beverages and a peptide preparation as claimed in  claim 25  as glutamine peptide source.  
     
     
         32 . A glutamine peptide enteral nutrition comprising carriers, diluents and excipients for enteral nutrition and a peptide preparation as claimed in  claim 25  as glutamine peptide source.  
     
     
         33 . A glutamin-rich gluten-free peptide preparation, comprising an enzymatic hydrolysate of gluten protein from which the protein fragments that cause hypersensitivity in coeliac patients have been removed.