Causes convulsions mice. Expressed by the venom duct. Is present in all duct parts with a highest content in part 2 (proximal of the venom bulb) and then decreases in concentration toward the end of the duct. The presence of a 'disulfide through disulfide knot' structurally defines this protein as a knottin. The cysteine framework is VI/VII (C-C-CC-C-C). The C-terminal amidation is described in Ref.1 and PubMed:23031820, but not in PubMed:22709442.