This property is attributed to the phospholipase A2(PLA2) class of enzymes, independently of their catalytic capability.Some PLA2s from snakes belonging to the genus Bothropsexert antineoplastic action, such as myotoxin-II from Bothropsasper that is cytotoxic to adrenal tumor, and MjTX-II fromBothrops moojeni venom that is cytotoxic to Ehrlich ascitestumor, SKBR3 breast adenocarcinoma, and Jurkat T-cell leukemia [19]. This evidence concerns the gene PLA2G2A and breast adenocarcinoma.