FIELD: medicine. SUBSTANCE: calf defibrinized blood is subjected for hydrolysis with bacterial endoprotease. Enzyme inactivation is carried out by heating reaction mass up to 80-98 C and inert substances at molecular mass above 5000-8000 Da were precipitated by ethanol addition and removed by step ultrafiltration. For medicinal form preparing preserving agent is added and sterilizing filtration on diaphragms (0.22 mcm) is carried out. EFFECT: high biological activity, increased yield of the end product.
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