Binds voltage-independently sodium channels (Nav) and inhibits the inactivation of the activated channels, thereby blocking neuronal transmission. Is highly toxic to insects and barely toxic to mammals. As it does not compete with the classical alpha-toxin AaH2, this toxin is considered as an alpha-like toxin. Expressed by the venom gland. Has the structural arrangement of an alpha-helix connected to antiparallel beta-sheets by disulfide bonds (CS-alpha/beta). Belongs to the long (4 C-C) scorpion toxin superfamily. Sodium channel inhibitor family.