Thrombin-like snake venom serine protease that activates fibrinogen by releasing both fibrinopeptides A and B. Has also fibrinogenolytic activity, with a complete digestion of alpha chain (FGA) at 30 min and of beta chain (FGB) at 60 min. Inhibited by EDTA, but not PMSF and beta-mercaptoethanole. Monomer. Expressed by the venom gland. Does not activate factor XIII, and does not degrade gamma chain of fibrinogen. Belongs to the peptidase S1 family. Snake venom subfamily.