Snake venom metalloproteinase that impairs hemostasis in the envenomed animal. Cleavage of 5-His-|-Leu-6, 10-His-|-Leu-11, 14-Ala-|-Leu-15, 16-Tyr-|-Leu-17 and 23-Gly-|-Phe-24 of insulin B chain. Identical to the cleavage of insulin B chain by atrolysin C. Also cleaves Xaa-|-Ser bonds in glucagon. Binds 1 zinc ion per subunit. Monomer. Expressed by the venom gland. The N-terminus is blocked. Belongs to the venom metalloproteinase (M12B) family. P-I subfamily.