The invention relates to the field of medicines, in particular to a yak
skin polypeptide with blood tonifying effect and a preparation method thereof.The molecular weight of the yak
skin polypeptide is composed of 17KDa, 34KDa and 43KDa, the maximum
ultraviolet absorption
wavelength of
peptide bonds is at 216nanometer, the
amide I band
infrared spectrum is at 1600 '-1700' cm <-1>, the
amide II band
infrared spectrum is at 1560 '-1500' cm <-1>, and the
amide III
infrared spectrum is at 1234 '-1237' cm <-1>.The preparation method comprises
grinding skin, heating, extracting foam, preparing enzymolysis solution, centrifuging, concentrating, separating, and
drying.According to the invention, the pure natural
pollution-free Qinghai-Tibet
plateau yak skin is used as a main
raw material, the rawmaterial sources are wide, the
nutrition is rich, the economic added value of the yak skin is improved; and meanwhile, a product with the effect of enriching blood is added; the preparation operationflow is simple, and the prior peeling
machine is changed into a
grinding machine, so that waste caused by different thickness of raw materials is avoided; and the prepared yak skin polypeptide has theblood-enriching bioactive components with three molecular weight sections.