Has several reductase activities that are NAD(P)H-dependent and involve FMN as a cofactor, ferricyanide being the best substrate for reduction. May be involved in ferric iron assimilation. FMNH2 + NADP(+) = FMN + 2 H(+) + NADPH FMNH2 + NAD(+) = FMN + 2 H(+) + NADH Homodimer. Induced by low temperature and by cycloheximide. Present with 1270 molecules/cell in log phase SD medium.