Potent toxin that may paralyze and/or kill insect pests such as H.virescens (lepidoptera), S.exigua (beet armyworm) and M.sexta (tobacco hornworm). Expressed by the venom gland. The presence of a 'disulfide through disulfide knot' structurally defines this protein as a knottin. Belongs to the neurotoxin 02 (plectoxin) family. 02 (plectoxin) subfamily.