Snake venom phospholipase A2 (PLA2) that inhibits neuromuscular transmission by blocking acetylcholine release from the nerve termini. PLA2 catalyzes the calcium-dependent hydrolysis of the 2-acyl groups in 3-sn-phosphoglycerides. Very weakly suppress the acetylcholine (ACh)-evoked current mediated by alpha-7-similar nAChRs in L.stagnalis neurons. a 1,2-diacyl-sn-glycero-3-phosphocholine + H2O = a 1-acyl-sn-glycero-3-phosphocholine + a fatty acid + H(+) Binds 1 Ca(2+) ion. Expressed by the venom gland. LD(50) is 3.6 mg/kg by intraperitoneal injection. Belongs to the phospholipase A2 family. Group I subfamily. D49 sub-subfamily.