The invention belongs to the technical field of biological
peptide extraction, and particularly discloses blood
protein polypeptide as well as a preparation method and application thereof. Comprising the following steps: S1, collecting fresh animal blood, adding a
sodium citrate solution, centrifuging, discarding
plasma, and collecting blood cells; s2, adding the blood cells obtained in the step S1 into
purified water, performing uniform mixing, adjusting the pH value to be acidic, adding
papain, performing first enzymolysis, after enzymolysis is finished, performing heating for
enzyme deactivation, performing
centrifugation, and taking supernate, so as to obtain enzymatic
hydrolysate; and S3, adjusting the pH value of the enzymatic
hydrolysate obtained in S2 to be alkaline, adding
alkaline protease, carrying out secondary enzymolysis, and after the enzymolysis is finished, carrying out heating
enzyme deactivation,
centrifugation,
sediment discarding,
ultrafiltration,
centrifugation, supernatant taking and freeze-
drying to obtain the blood
protein polypeptide. The invention discloses a blood
protein polypeptide as well as a preparation method and application thereof. The blood protein polypeptide is applied to food or health care products and can effectively improve
anemia and recover the number of red blood cells.