The invention is: a natural active water-soluble
protein and polypeptide and a preparation method thereof. Using selected natural
protein-rich raw materials, through
grinding and pulping, using a
protein extractant to extract crude protein, using a
solvent for simple
degreasing, and then enzymatic fine
degreasing and enzymatic fine decellulose to obtain refined protein pulp, and then Use end-capping agents to protect useful protein end groups, then use local acidifiers to locally acidify the
long chain of proteins, then use acid
protease for preliminary
enzymatic hydrolysis,
neutral protease for deep
enzymatic hydrolysis, and timely detect the molecular weight, molecular
weight distribution and amino acids of water-soluble proteins and polypeptides Content and other control indicators, when the control indicators reach the required value, stop the
enzymatic hydrolysis reaction, then add deodorizing agent to remove
odor, decolorizing agent to decolorize, filter and separate through filter, freeze or spray dry to obtain the finished product of natural active water-soluble protein and polypeptide .