. "Catalysis of the reaction: nitrite + NAD(P)+ + H2O = nitrate + NAD(P)H + H+." . . . "assimilatory nitrate reductase activity" . "nitrate reductase [NAD(P)H] activity" . "assimilatory NAD(P)H-nitrate reductase activity" . "NAD(P)H bispecific nitrate reductase activity" . "NAD(P)H-nitrate reductase activity" . "NAD(P)H2:nitrate oxidoreductase activity" . "NAD(P)H:nitrate oxidoreductase activity" . "nitrate reductase (reduced nicotinamide adenine dinucleotide (phosphate)) activity" . "nitrate reductase [NAD(P)H2]" . "nitrate reductase NAD(P)H activity" . "nitrite:NAD(P)+ oxidoreductase activity" . . .