G. Bernadsky, A. Bdolah and E. Kochva. Gel permeation patterns of venoms from eleven species of the genus Vipera. Toxicon 24, 721 - 725, 1986. - Gel filtration of venoms from eleven species of the genus Vipera shows similar patterns on Sephadex G-75, with three groups of protein peaks. The second group, which contains phospholipase A2, is variable among the species. As found in some other viperids, the venom of V. bornmuelleri shows synergism between phospholipase A and other fractions that considerably increases lethal potency.