Steroid 17-alpha-hydroxylase/17,20 lyase (CYP17A1)

Conversion of pregnenolone and progesterone to their 17- alpha-hydroxylated goods and subsequently to dehydroepiandrosterone (DHEA) and androstenedione. Catalyzes both the 17-alpha-hydroxylation and the 17,20-lyase reaction.

Involved in sexual development during fetal life and at puberty. .