[Comparative characteristics of several properties of the estradiol-binding system of the human uterus and fallopian tubes].

Kinetic and thermodynamic parameters of estradiol-receptor interactions were studied in cytosol of human uterus endometrium and of uterus tubes. Specificity of these reactions was investigated. The receptor systems studied were distinctly dissimilar in the values of Ka equilibria, rate constants of association and dissociation with estradiol as well as in the affinity to a series of natural and synthetic estrogens.