Figure 3
Displacement of 3H-progesterone from crude membranes of CHO cells expressing mPRα in the presence of vehicle or 1000-fold excess of nonradioactive steroids. Steroids included progesterone (P4), 17α-hydroxyprogesterone (17-OH-P4), 20α-hydroxyprogesterone (20-OH-P4), estradiol, testosterone, cortisol, or RU486. Values are means ± S.E. (n = 3). *P < 0.001, compared to vehicle control.