Snake venom phospholipase that inhibits ADP- and collagen-induced human platelet aggregation. This inhibition is completely inhibited by abolition of catalytic activity in case of collagen as inducer and partially inhibited in case of ADP as inducer. 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. Monomer. Expressed by the venom gland. Belongs to the phospholipase A2 family. Group II subfamily. D49 sub-subfamily.