Not toxic. Induces an immune response similar to that induced by whole venom. Induces a dose dependent release of the neurotransmitters glutamic acid and gamma aminobutyric acid from rat brain synaptosomes. Thus, polyclonal antibodies raised against this protein can neutralize the effects of the venom. Expressed by the venom gland. Has the structural arrangement of an alpha-helix connected to antiparallel beta-sheets by disulfide bonds (CS-alpha/beta). LD(50) is 15 mg/kg by intravenous injection into mice. Belongs to the long (4 C-C) scorpion toxin superfamily. Sodium channel inhibitor family. Alpha subfamily.