Snake venom serine protease that activates plasminogen. Weakly hydrolyzes the alpha chain of human fibrinogen without releasing fibrinopeptide A. Does not hydrolyze plasma kallikrein or factor Xa. Does not clot fibrinogen. Does not affect platelet function. Induces hypotensive effects on rats. Shows a preferential cleavage at Lys-|-Xaa over Arg-|-Xaa bonds. Inhibited by the serine protease inhibitors NPGB, PMSF, p-aminobenzamidine and aprotinin. Not inhibited by soybean trypsin inhibitor or EDTA. Monomer. Expressed by the venom gland. N-glycosylated. PubMed:17034951 shows that it contains approximately 10% carbohydrates, PubMed:10871053 shows that it contains approximately 20% carbohydrates. Belongs to the peptidase S1 family. Snake venom subfamily.