Expressed by the venom duct. The cysteine framework is XIV (C-C-C-C). Very weakly inhibits potassium channels in PC12 cells. Very weekly and reversibly inhibits Kv1.3/KCNA3 in HEK293 cells (Ki=12.1 uM). Does not inhibit Kv1.1/KCNA1, Kv1.2/KCNA2 and Kv1.3/KCNA3 when expressed in oocytes (tested at 10 uM). Belongs to the conotoxin R superfamily.