Steroid 21-Hydroxylase

**Semantic type:** Amino Acid, Peptide, or Protein|Enzyme

**Definition:** Steroid 21-hydroxylase (494 aa, ~56 kDa) is encoded by the human CYP21A2 gene. This protein plays a role in steroid hydroxylation.

**Synonyms:** - 21-OHase - CYP21 - CYP21A2 - CYP21B - Cytochrome P-450c21 - Cytochrome P450 21 - Cytochrome P450 Family 21 Subfamily A Polypeptide 2 - Cytochrome P450 Subfamily XXIA (Steroid 21-Hydroxylase) Polypeptide 2 - Cytochrome P450 XXI - Cytochrome P450 XXIB - Cytochrome P450-C21 - Cytochrome P450-C21B - Cytosteroid 21-Monooxygenase - EC 1.14.99.10 - P450-C21B