Heterodimer: conodipine-M catalyzes the calcium-dependent hydrolysis of the 2-acyl groups in 3-sn-phosphoglycerides. This activity may be supported by the alpha chain. Conodipine-M inhibits the binding of isradipine (a ligand specific for L-type calcium channel) to L-type calcium channels. a 1,2-diacyl-sn-glycero-3-phosphocholine + H2O = a 1-acyl-sn-glycero-3-phosphocholine + a fatty acid + H(+) Inhibited by linoleoyl amide and MG14. Heterodimer of an alpha and a beta chains; probably disulfide-linked. Expressed by the venom duct. Belongs to the phospholipase A2 family. Group IX subfamily.