1.14.13.211 FAD enzyme Rox is a probable FAD-dependent monooxygenase because it contains the FAD-binding domain (Pfam accession number PF01494) 734035 1.14.13.211 FAD NADPH efficiently reduces the FAD only when rifampicin is present, implying that rifampicin binds before NADPH in the catalytic scheme 738694 1.14.13.211 NAD(P)H - 734035 1.14.13.211 NADPH NADPH efficiently reduces the FAD only when rifampicin is present, implying that rifampicin binds before NADPH in the catalytic scheme 738694