Cholestenone 5 alpha-Reductase

**Definition:** An oxidoreductase that catalyzes the conversion of 3-oxo-delta4 steroids into their corresponding 5alpha form. It plays an important role in the conversion of TESTOSTERONE into DIHYDROTESTOSTERONE and PROGESTERONE into DIHYDROPROGESTERONE.

**Tree numbers:** - D08.811.682.660.200

**Synonyms:** - 4-Ene Steroid 5 alpha-Reductase - 5 alpha-Reductase