Snake venom protease that shows fibrinogenolytic activities. Preferentially degrades the alpha-chain of human fibrinogen (FGA) and slowly degrades the beta-chain (FGB). Has no effect on the gamma-chain. Can hydrolyze fibrinogen without forming fibrin clots and also can degrade fibrin. Hydrolyzes the substrate of plasmin more potently than the substrate of thrombin. Shows a preferential cleavage at Lys-|-Xaa instead of Arg-|-Xaa bonds. Its activity is completely inhibited by PMSF, and almost not inhibited by EDTA. Monomer. Expressed by the venom gland. Belongs to the peptidase S1 family. Snake venom subfamily.