Inhibits voltage-gated calcium channels (Cav) in rat cerebellar granule cells (By similarity). Has insecticidal activity to crickets (Acheta domesticus) (PubMed:19374957). Is not toxic to mice (PubMed:19374957). Expressed by the venom gland. LD(50) is 9.2 +-0.9 mg/kg in juvenile house crickets (Acheta domesticus). Does not inhibit insect and mice voltage-gated sodium channels (para/tipE, Nav1.2/SCN2A, Nav1.5/SCN5A). Belongs to the neurotoxin 12 (Hwtx-2) family. 06 (TXP1) subfamily.