Process for preparing hybrid proteins

A - Human Necessities – 23 – J

Patent

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A23J 3/00 (2006.01) A23J 3/22 (2006.01) A23L 1/05 (2006.01) C07K 1/107 (2006.01) C07K 19/00 (2006.01)

Patent

CA 2661310

Hydrothermal processes are provided for preparing hybrid proteins containing altered SS/SH bonds, thereby yielding hybrid proteins having enhanced functional and/or nutritional properties. The processes involve initial homogenization of a protein-containing slurry containing at least two proteins, followed by high pressure steam treatment in a jet cooker (16) or similar device in order to heat shock and thereby alter the conformation of some of the proteins, followed by a holding period to allow the proteins to reform, whereupon the proteins are cooled. Plant and animal proteins may be processed, and the starting slurry can be pH- modified and/or supplemented with one or more additional ingredients (e.g., salts, phosphates, fatty acids, polysaccharides, alcohols, aromatic compounds). The hybrid proteins are useful as food ingredients (e.g., solubility, wetability, dispersibility, foaming, emulsification, viscosity, gelation or thickening agents).

L'invention concerne des procédés hydrothermiques de préparation de protéines hybrides incluant des liaisons SS/SH modifiées, ce qui produit des protéines hybrides dotées de propriétés fonctionnelles et/ou nutritionnelles améliorées. Les procédés mettent en jeu l'homogénéisation initiale d'une bouillie contenant au moins deux protéines, suivie d'un traitement à la vapeur d'eau haute pression dans un bouilleur à jet (16) ou un dispositif analogue afin de soumettre certaines des protéines à un choc thermique pour en modifier la conformation, puis d'une période d'attente permettant aux protéines de se reformer, et enfin d'une période de refroidissement. Des protéines végétales et animales peuvent être traitées, et la bouillie de départ peut être modifiée dans son pH et/ou supplémentée par un ou plusieurs ingrédients (par exemple, sels, phosphates, acides gras, polysaccharides, alcools, composés aromatiques). Les protéines hybrides sont utiles comme ingrédients alimentaires (par exemple, agents de solubilité, de mouillabilité, de dispersibilité, de moussage, d'émulsification, de viscosité, de gélification ou d'épaississement).

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