Thrombin-like snake venom serine protease that clots fibrinogen by releasing fibrinopeptide A from the alpha chain of fibrinogen (FGA), induces platelet aggregation through its interaction with GPIb (GP1BA/GP1BB), and activates factor VIII (F8). 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. Inhibited by diisopropylfluorophosphate (DFP), but not by hirudin. Optimum pH is 7.4-8.0 for the clotting activity. Monomer. Expressed by the venom gland. Belongs to the peptidase S1 family. Snake venom subfamily.