Cortisone Reductase

**Definition:** An enzyme that catalyzes the interconversion of a ketone and hydroxy group at C-20 of cortisone and other 17,20,21-trihydroxy steroids. EC 1.1.1.53.

**Tree numbers:** - D08.811.682.047.820.125.150

**Synonyms:** - 20-beta-Hydroxysteroid Dehydrogenase