Estrogen and progestin receptors in mouse vaginal epithelium and fibromuscular wall.

Both sodium molybdate and Percoll density gradient stabilize the hormone-binding capacities of the estrogen and progestin receptors and individually increase the recovery of these receptors in prepared cytosols of the separated mouse vaginal epithelium and fibromuscular wall. Their effects are additive. The concentrations of estrogen receptors are similar in the epithelial and fibromuscular compartments, whereas progestin receptor concentrations are higher in the epithelium.