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Biology of Reproduction, Vol 23, 518-521, Copyright © 1980 by Society for the Study of Reproduction
1 Department of Urology and Department of Obstetrics and Gynecology,
University of Washington School of Medicine,
Seattle, Washington 98195 The concentration of the cytosolic androgen receptor of the ventral prostate gland of the male
rat was measured at various time periods prior to, at the time of, and following the sexual maturation of the animal. The prostatic dihydrotestosterone (DHT) receptor gradually increased from 29
femtomoles (fm)/mg cytosol protein during the early postnatal period (Day 16 of age) to a peak of
87 fm/mg protein around the time when the rat attains sexual maturity (Day 50 of age). Following
this, the receptor concentration declined precipitously to a level of 19 fm/mg protein at Day 70 of
age. These results suggest that the level of the prostatic DHT receptor observed during these time
periods may be important in the imprinting mechanism of the rat ventral prostate gland that is
known to occur in the rat sometime between Day 35 and Day 65 of age.
Accepted on July 2, 1980
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