The invention provides a
Hyriopsis cumingii enzymolysis polypeptide, preparation and application thereof. The enzymolysis method comprises the following steps that: fresh
Hyriopsis cumingii meat is crushed and pulped, and added with water of which the weight is 5 to 6 times of that of the fresh
Hyriopsis cumingii meat; the mixture is boiled and filtered; the precipitate is dried and degreased to obtain albumen
powder of the Hyriopsis cumingii meat; the albumen
powder of the Hyriopsis cumingii meat is soaked in water of which the weight is 6 to 8 times of that of the albumen
powder of the Hyriopsis cumingii meat for 11 to 12 hours and subjected to
superfine grinding and even pulping, and the pH value of the
mixed solution is adjusted to between 8.0 and 9.0; based on the albumen content in the albumen powder of the Hyriopsis cumingii meat, 0.3 to 0.6 percent of alkali
protease is added in the
mixed solution for enzymolysis for 4 to 6 hours at a temperature of between 40 and 60 DEG C; the obtained supernatant is condensed and dried to obtain the Hyriopsis cumingii enzymolysis polypeptide; and by testing, the content of the total albumen of the Hyriopsis cumingii enzymolysis polypeptide is more than or equal to 80 percent, wherein the contents of asparagic acid,
glutamic acid,
leucine,
lysine and
arginine are more than or equal to 50 percent, and the molecular weight is mainly concentrated in two zones of 6,100Da and 26,200Da. By a test for culturing mouse lymphocytes
in vitro, the Hyriopsis cumingii enzymolysis polypeptide can be used for preparing a medicament for promoting proliferation of the T lymphocute and a health care food for improving the
immunity.