Catalyzes the hydrolysis of phosphatidylcholine with phospholipase A1 (EC 3.1.1.32) activity (By similarity). Shows hemolytic activity (By similarity). 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. Binds to IgE. Causes an allergic reaction in human. Belongs to the AB hydrolase superfamily. Lipase family.