Molecular events associated with Macrovipera lebetina obtusa and Montivipera raddei venom intoxication and condition of biomembranes

► Membrane bilayer condition abnormalities following Macrovipera lebetina obtusa and Montivipera raddei snakes envenomation. ► Viper venoms disturb the local packing structure of lipids and fluidity of bilayer. ► The binding of viper venom proteins to lipid bilayer is strictly curvature-dependent. ► Viper venoms demonstrate rather surface activity during BLM-peptide interaction.