Snake venom zinc metalloprotease that hydrolyzes the alpha-chain (FGA) and more slowly the beta-chain (FGB) of fibrinogen. Inhibits cell proliferation and induces cell morphologic changes transiently on human umbilical vein endothelial cells. Binds 1 zinc ion per subunit. Inhibited by EDTA and DTT, and partially inhibited by EGTA, but not inhibited by PMSF and NEM. Homodimer; disulfide-linked. Expressed by the venom gland. The N-terminus is blocked. Does not affect gamma-chain of fibrinogen (FGG). Does not show apoptosis effects (PubMed:16487560). Belongs to the venom metalloproteinase (M12B) family. P-III subfamily. P-IIIc sub-subfamily.