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Enzymes in the steroidogenic pathway.

Steroid 17,20-lyase

Pathways:

17 a -Hydroxypregnenolone à Dehydroepiandrosterone

17 a -Hydroxyprogesterone à Androstenedione

Reaction: cleavage of steroid C17-C20 bond

Cofactors:

Inhibitors:

Enzyme Synonyms: P450c17 (steroid 17 a - hydroxylase/17,20-lyase/17,20 desmolase);

CYP17