Inhibits insect, but not mammalian, voltage-gated calcium channels (Cav). Expressed by the venom gland. The presence of a 'disulfide through disulfide knot' structurally defines this protein as a knottin. Several paralogs that code for the same precursor are shown in this entry, whereas other paralogs are shown in AC S0F211, AC S0F205, AC S0F1N1, AC S0F212. Belongs to the neurotoxin 08 (Shiva) family. 01 (omega toxin) subfamily.