Purification, sequencing and structural characterization of the phospholipase A 1 from the venom of the social wasp polybia paulista: (Hymenoptera, vespidae) - Santos, Lucilene D.; Santos, Keity S.; Souza, Bibiana M. de; Arcuri, Helen A.; Cunha Neto, Edecio; Castro, Fabio Morato; Kalil, Jorge E.; Palma, Mario S. (Toxicon, 2007)