In enzymology, a steroid 11beta-monooxygenase is an enzyme that catalyzes the chemical reaction a steroid + reduced adrenal ferredoxin + O2 ⇌ {\displaystyle \rightleftharpoons } an 11beta-hydroxysteroid + oxidized adrenal ferredoxin + H2OThe 3 substrates of this enzyme are steroid, reduced adrenal ferredoxin, and O2, whereas its 3 products are 11beta-hydroxysteroid, oxidized adrenal ferredoxin, and H2O. Wikipedia