Snake venom phospholipase A2 (PLA2) that shows moderate neurotoxic activity in isolated mouse phrenic nerve diaphragm but shows high neurotoxic activity in a chick biventer cervis preparation. Also shows a high bactericidal effect against both Gram-negative and Gram-positive bacteria. PLA2 catalyzes the calcium-dependent hydrolysis of the 2-acyl groups in 3-sn-phosphoglycerides. 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. Activated by heparin. Inhibited by its chaperone crotapotin. Optimum pH is 8.5. Optimum temperature is 18 degrees Celsius. When this protein is associated with crotapotin (F5 or F7), it forms the crotoxin protein. Expressed by the venom gland. Belongs to the phospholipase A2 family. Group II subfamily. D49 sub-subfamily.