This domain is found in sulfite reductase, NADPH cytochrome P450 reductase, Nitric oxide synthase and methionine synthase reductase.

1: The flavin reductase activity of the flavoprotein component of sulfite reductase from Escherichia coli. A new model for the protein structure. Eschenbrenner M, Coves J, Fontecave M; J Biol Chem 1995;270:20550-20555. PMID:7657631

2: NADPH-sulfite reductase flavoprotein from Escherichia coli: contribution to the flavin content and subunit interaction. Eschenbrenner M, Coves J, Fontecave M; FEBS Lett 1995;374:82-84. PMID:7589518

3: Dissection of NADPH-cytochrome P450 oxidoreductase into distinct functional domains. Smith GC, Tew DG, Wolf CR; Proc Natl Acad Sci U S A 1994;91:8710-8714. PMID:8078947

4: Three-dimensional structure of NADPH-cytochrome P450 reductase: prototype for FMN- and FAD-containing enzymes. Wang M, Roberts DL, Paschke R, Shea TM, Masters BS, Kim JJ; Proc Natl Acad Sci U S A 1997;94:8411-8416. PMID:9237990