Snake venom phospholipase A2 (PLA2) that shows presynaptic neurotoxicity. 10 ug/ml of this protein produce complete neuromuscular blockade up to 70 minutes, without inhibiting the responses to acetylcholine (ACh), but with a partial inhibition (67%) of the response to potassium chloride (KCl). 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. Dimer. Expressed by the venom gland. Belongs to the phospholipase A2 family. Group II subfamily. D49 sub-subfamily.