Inhibition of which step in the steroid hormone synthetic pathway blocks the production of all androgenic compounds in the adrenal cortex, but not the production of glucocorticoids or mineralocorticoids?

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[Chapter 7, V A 1; Figure 7.11]. 17,20-Lyase catalyzes the conversion of glucocorticoids to the androgenic compounds dehydroepiandrosterone and androstenedione. These androgenic compounds are the precursors of testosterone in both the adrenal cortex and the testicular Leydig cells.

Inhibition of Which Step in the Steroid Hormone Synthetic Pathway 5α5 \alpha5α

Inhibition of Which Step in the Steroid Hormone Synthetic Pathway $5 \alpha$