Causes paralysis to insect larvae (H.virescens). This toxin is active only on insects. Expressed by the venom gland. The presence of a 'disulfide through disulfide knot' structurally defines this protein as a knottin. PD(50) is 3.70 +/- 0.19 mg/kg by injection into the abdomen of larvae of H.virescens. Belongs to the neurotoxin 13 (insecticidal toxin ABC) family. 02 (Calisoga) subfamily.