| Name | 3-oxo-5-alpha-steroid 4-dehydrogenase 1 |
| Description | Converts testosterone into 5-alpha-dihydrotestosterone and progesterone or corticosterone into their corresponding 5-alpha-3-oxosteroids. It plays a central role in sexual differentiation and androgen physiology. |
| UniProt ID | P18405 |
| Gene | SRD5A1 |
