Shows antibacterial activity against both Gram-positive bacteria (B.subtilis, M.luteus, E.faecalis) and Gram-negative bacteria (P.aeruginosa, Y.enterocolitica, A.calcoaceticus) (PubMed:19540868). Modifies membrane sodium permeability on Y.enterocolitica (PubMed:19540868). Is toxic to cockroaches and crabs, but is not toxic to mice. Does not induce haemolysis in human erythrocytes (PubMed:19540868). Acts by inhibiting the sodium (Nav) currents (By similarity). Expressed by the venom gland. Has the structural arrangement of an alpha-helix connected to antiparallel beta-sheets by disulfide bonds (CS-alpha/beta). Monoisotopic. Belongs to the long (4 C-C) scorpion toxin superfamily. Sodium channel inhibitor family. Beta subfamily.