Scorpion venom polypeptide for promoting cell proliferation and preparation method and medicinal application thereof

The invention relates to a scorpion venom polypeptide for promoting cell proliferation and a preparation method and medicinal application thereof. The scorpion venom polypeptide for promoting cell proliferation is characterized by being separated from the scorpion venom of Buthus martensii Karsch and then purified, 66 amino acid residues at the N end of the scorpion venom polypeptide for promoting cell proliferation are of a sequence shown in SEQ ID No. 1 in a sequence table and have molecular weight of 7217.4Da. The new polypeptide which is from the scorpion venom of Buthus martensii Karsch has a function of promoting the proliferation of hematopoietic cells and has the characteristics of single component, accurate molecular weight, clear 66 amino acid residues at the N end, obvious effect of promoting cell proliferation, controllable quality standard of the purification process; therefore the scorpion venom polypeptide for promoting cell proliferation is favorable to large-scale production. The scorpion ven