1.5.1.34 7,8-dihydrobiopterin reductase, BmDhpr, DHPR, dicDHPR, dihydropteridine reductase, dihydropteridine reductase (NADH), DQPR gene product, EcDHPR, NADH-dihydropteridine reductase, NADPH-dihydropteridine reductase, NADPH-specific dihydropteridine reductase, NfsB, PTR2, QDPR, quinoid dihydropteridine reductase, reductase, dihydropteridine (reduced nicotinamide adenine dinucleotide) - 1.5.1.34 additional information enzyme is not identical with dihydrofolate reductase 1.5.1.34 NprA nitroreductase enzyme shows nitroreductase activity with a wide range of nitroaromatic compounds, but highest activity is detected with the quinonoid form of 6,7-dimethyl-7,8-dihydropterine as substrate, in vivo role as dihydropteridine reductase involved in aromatic amino acids metabolism suggested 1.5.1.34 EC 1.6.99.10, EC 1.6.99.7 formerly 1.5.1.34 additional information NADPH-specific dihydropteridine reductase and NADH-dihydropteridine reductase have no common antigenic determinants, and show different physicochemical properties