ID 1.5.1.45 DE FAD reductase [NAD(P)H]. CA (1) FADH2 + NAD(+) = FAD + 2 H(+) + NADH. CA (2) FADH2 + NADP(+) = FAD + 2 H(+) + NADPH. CC -!- This enzyme, isolated from the bacterium Geobacillus CC thermodenitrificans, participates in the pathway of tryptophan CC degradation. CC -!- The enzyme is part of a system that also includes a bifunctional CC riboflavin kinase/FMN adenylyltransferase and EC 1.14.14.8. CC -!- It can reduce either FAD or flavin mononucleotide (FMN) but prefers CC FAD. CC -!- The enzyme has a slight preference for NADPH as acceptor. cf. CC EC 1.5.1.37. DR A4IT49, NFADR_GEOTN; //