QR2 is an alias for the gene, NAD(P)H dehydrogenase, quinone 2, in humans. Other names include: Ribosyldihydronicotinamide dehydrogenase [quinone]; NRH dehydrogenase [quinone] 2; NRH:quinone oxidoreductase 2; Quinone reductase 2; Ribosyldihydronicotinamide dehydrogenase [quinone] ; DHQV; DIA6; NMOR2. The encoded protein is an enzyme with an amino acid length of 231 and a mass of 25.9 kDa. Other isoforms may exist. QR2 is a member of the NAD(P)H dehydrogenase (quinone) family. This gene shares homology with other species, including: Mouse, Rat, Chicken.