Has phospholipase activity, probably a phospholipase A1 activity as suggested by sequence similarity. In vivo, induces dose-dependently platelet aggregation at nanomolar concentration and induces thrombosis in vivo (PubMed:18023835). a 1,2-diacyl-sn-glycero-3-phosphocholine + H2O = a 2-acyl-sn-glycero-3-phosphocholine + a fatty acid + H(+) Expressed by the venom gland. Causes an allergic reaction in human. Binds to IgE. Belongs to the AB hydrolase superfamily. Lipase family.