Mu-conotoxins block voltage-gated sodium channels (Nav). This toxin inhibits tetrodotoxin(TTX)-sensitive sodium channels, but does not affect TTX-resistant sodium channels. Reduces the amplitude of currents without changing the activation and inactivation kinetics of currents. 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). Does not have the ability to interact with the G-protein coupled somatostatin type 3 receptor (SSTR3). Belongs to the conotoxin T superfamily.