Sequence Cluster id id2 desc organism isHeteromeric 1 Singleton1 TCDB::Q9UA35 2.A.41.2.5 Broadly selective nucleoside:Na+ cotransporter, hfCNT (transports uridine, thymidine, inosine, 3'-azido-3'deoxythymidine, 2'3'dideoxycytidine, and 2'3'dideoxyinosine) (Na+/uridine = 2) Eptatretus stoutii (Pacific hagfish)