Snake venom serine protease that may act in the hemostasis system of the prey (By similarity). Has weak fibrinogen clotting activity. Possesses amidolysis activity towards S-2251 (substrate for plasmin) but has no hydrolytic activity with S-2302 (plasma kalikrein substrate) or S-2238 (thrombin substrate). Inhibited by PMSF at 2 mM concentration but not by EDTA. Monomer. Expressed by the venom gland. Does not activate nor degrade plasminogen or prothrombin (F2). Does not activate factor XIII. Belongs to the peptidase S1 family. Snake venom subfamily.