. "\"Catalysis of the transmembrane transfer of a sodium ion by a channel that opens when a specific ligand has been bound by the channel complex or one of its constituent parts.\" [GOC:mah]" . . "ligand-gated sodium channel activity" . . . "amiloride-sensitive sodium channel activity" . "acid-sensing ion channel activity" . "ASIC activity" . "epithelial sodium channel" .