Inhibits voltage-gated calcium channels (Cav) in rat cerebellar granule cells (By similarity). Has insecticidal activity (By similarity). Expressed by the venom gland. The primary structure of the mature peptide is identical to that of Eurypelma spider toxin 2 from Aphonopelma californicum (AC P61510). Belongs to the neurotoxin 12 (Hwtx-2) family. 06 (TXP1) subfamily. It is reported in PubMed:11790834 that disulfide bonds may be in positions 4-17, 8-31 and 25-36.