2.7.1.173 NaR kinase, nicotinamide riboside kinase, nicotinamide riboside kinase 1, nicotinamide riboside kinase 2, nicotinic acid riboside kinase, nicotinic acid riboside kinase 1, NMRK1, NMRK2, NR kinase, Nrk, NRK1, Nrk2, ribosylnicotinic acid kinase - -, 682879, 698901, 718225, 718250, 738213, 739212, 761705 2.7.1.173 NRK1 ambiguous - 2.7.1.173 additional information see also EC 2.7.1.22 761705