ID 1.14.99.12 DE androst-4-ene-3,17-dione monooxygenase. AN 4-androstene-3,17-dione monooxygenase. AN androst-4-ene-3,17-dione 17-oxidoreductase. AN androstene-3,17-dione hydroxylase. AN androstenedione monooxygenase. CA AH2 + androst-4-ene-3,17-dione + O2 = A + H2O + testololactone. CC -!- Has a wide specificity. CC -!- A single enzyme from Cylindrocarpon radicicola (EC 1.14.13.54) CC catalyzes both this reaction and that catalyzed by EC 1.14.99.4. //