High affinity binding of labeled androgens in the androgen-target tissues of the male rhesus monkey.

High affinity testosterone (T)-specific and dihydrotestosterone (DHT)-specific binding sites exist in a 1:2 ratio in the cytosol fractions of the caput epididymidis, prostate, seminal vesicles and the ductus deferens of the rhesus monkey. The number of androgen-binding sites in the caput epididymis is 3 times greater than that of the other 3 tissues.