in contrast , progestin binding to nuclear receptor was not increased in estrogen-primed animals , nor did acute injection of progesterone ( 100 micrograms s.c. ) increase the amount of saturable , high affinity ( 10 ( 9 ) m-1 ) nuclear progestin receptor in control or estradiol-primed athymic mice .
C0033308
progesterone
C0033306
progestin