Probable toxin from a worm-hunter cone snail (PubMed:31344776). Shows an excitatory activity on a majority of mouse lumbar dorsal root ganglion (DRG) neurons (PubMed:31344776). Very probably inhibits the inactivation of voltage-gated sodium channels (Nav) (Probable). Expressed by the venom 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). Belongs to the conotoxin O1 superfamily. Extended N-terminus.