Crystal structure of Bn IV in complex with myristic acid: A Lys49 myotoxic phospholipase A2 from Bothrops neuwiedi venom

► BN IV is a myotoxic phospholipase arrangement as a conventional dimmer. ► The relevant structural features for myotoxic activity are located in the C-terminal region. ► C-terminus is a probable heparin binding domain. ► Bn IV possible interact with muscle cell membranes mediated by heparin complexes.