Has a toxic effect on insects and mammals and is capable of competing with anti-insect scorpion toxins for binding to the sodium channel (Nav) of insects. It also modulates the binding of alpha-type and beta-type anti-mammal scorpion toxins to the mammal sodium channel. It may act on both site 3 and site 4 of voltage-gated sodium channels. 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.