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 10.8 +- 1.4 mg/kg in juvenile house crickets (Acheta domesticus). Belongs to the neurotoxin 12 (Hwtx-2) family. 06 (TXP1) subfamily.