Probable neurotoxin with unknown target. Possibly targets ion channels. Expressed by the venom duct. The cysteine framework is V (CC-CC). Contains 2 disulfide bonds that can be either 'C1-C3, C2-C4' or 'C1-C4, C2-C3', since these disulfide connectivities have been observed for conotoxins with cysteine framework V (for examples, see AC P0DQQ7 and AC P81755). Five different peptides have been described after total venom examination by HPLC-MS. Cal5a is the longest. Cal5b-Cal5e are identical in length but are differentially hydroxylated. It is possible that hydroxylation and proteolysis at position 53 are incomplete in some of these peptides. Cal5a-cal5e are found in dissected venom (DV).