Beta toxins bind voltage-independently at site-4 of sodium channels and shift the voltage of activation toward more negative potentials thereby affecting sodium channel activation and promoting spontaneous and repetitive firing. This toxin is active only on insects (By similarity). This toxin has very low anti-insect activity. Expressed by the venom gland. Has the structural arrangement of an alpha-helix connected to antiparallel beta-sheets by disulfide bonds (CS-alpha/beta). N-glycans are core-fucosylated, heterogeneous and short which could be the result of extensive trimming. LD(50) is 8.5 ug/g in Blattella germanica. Belongs to the long (4 C-C) scorpion toxin superfamily. Sodium channel inhibitor family. Beta subfamily.