Oxidoreductases;
Acting on paired donors, with incorporation or reduction of molecular oxygen;
With NADH or NADPH as one donor, and incorporation of one atom of oxygen into the other donor
The enzymes from the Gram-positive bacteria Streptomyces peucetius and Streptomyces purpurascens participate in the biosynthesis of daunorubicin, doxorubicin and rhodomycins. The enzyme from Streptomyces purpurascens is an FAD monooxygenase.