Thrombin-like snake venom serine protease. Cleaves fibrinogen (FGA) to split of fibrinopeptides AM, AO, and AY; the aberrant fibrinogen is then incapable of being cross-linked, forming easily dispersible clots. Selective cleavage of Arg-|-Xaa bond in fibrinogen, to form fibrin, and release fibrinopeptide A. The specificity of further degradation of fibrinogen varies with species origin of the enzyme. Monomer. Expressed by the venom gland. Belongs to the peptidase S1 family. Snake venom subfamily.