This is the most commonly used drug that targets a receptor whose N-terminal domain dimerizes to its ligand binding domain using the FXXFL motif. The un·deca·no·ate form of this drug is the only one that can be taken orally, and has a much longer duration when injected than the pro·pio·nate and en·an·thate prodrugs. This drug can be administered as monotherapy in forms such as a 1% gel or patch, according to (*) WPATH guidelines. In vivo, a double bond is removed from this drug’s leftmost ring by the enzyme 5-alpha-reductase. Due to a feedback loop, exogenous administration of this drug or its synthetic analogues in men can counterintuitively cause temporary gonadal atrophy. For 10 points, name this naturally occurring steroid hormone used in transmasculine hormone therapy. ■END■
ANSWER: testosterone [or testosterone undecanoate; or testosterone propionate; or testosterone enanthate; or methyltestosterone; accept T]
<AG>
= Average correct buzz position