Heterodimer: postsynaptic neurotoxin. Monomer: the acidic chain inhibits the basic phospholipase A2 of the complex. Heterodimer of a toxic basic protein having phospholipase A2 activity (B chain (AC Q8JFG0)) and a non-toxic acidic protein functioning as its inhibitor (A chain). Expressed by the venom gland. Belongs to the phospholipase A2 family. Group II subfamily. D49 sub-subfamily.