Vegetable protein peptide powder and preparation method thereof

Abstract

The invention discloses vegetable protein peptide powder and a preparation method thereof. The method comprises the steps: (1), uniformly mixing vegetable protein powder and water according to the mass ratio, and adjusting the pH value to 7.0-7.5; (2) adding a compound enzyme I, and carrying out heat preservation at the temperature of 40-50 DEG C, wherein the compound enzyme I comprises proline hydroxylase, neutral peptide chain endonuclease and trypsin; (3) after the enzymolysis is finished, heating to 92-98 DEG C, and carrying out heat preservation; (4) after cooling, adjusting the pH valueto 8.0-8.5, then adding a compound enzyme II into the vegetable protein liquid, and carrying out heat preservation at the temperature of 40-50 DEG C, wherein the compound enzyme II comprises plant proteolytic enzyme, papain and flavor enzyme; (5) after the enzymolysis is finished, heating to 92-98 DEG C, and carrying out heat preservation; and (6) after cooling, sequentially carrying out centrifugal separation, membrane separation desalination and freeze drying to obtain the vegetable protein peptide powder. According to the method, the protein peptide powder can be prepared from vegetable protein, and the tryptophan content is high.

Description

technical field [0001] The invention relates to a protein peptide powder, in particular to a plant protein peptide powder and a preparation method thereof. Background technique [0002] Collagen is a kind of protein, which is the most abundant type of protein in mammals, accounting for about 25% of the total protein content. It consists of three polypeptide chains intertwined in a superhelical form, contains a small amount of galactose and glucose, and is the main component of the extracellular matrix (ECM). Collagen contains a large amount of glycine, accounting for about 27% of the total amino acids. In addition, the content of proline and hydroxyproline in collagen is also particularly high, which are unique amino acids of collagen protein, both accounting for 8-14%, while the content of essential amino acids such as tryptophan, tyrosine and methionine is low. [0003] Due to the unique triple-helix stable structure, collagen is stable in nature, insoluble in cold water...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a plant protein peptide powder and its preparation method, which solves the problem of low amount of existing animal protein, can prepare protein peptide powder from plant protein, and has a relatively high tryptophan content