Abstract

The presence of nonestrogenic inhibitors of the rat-alpha-fetoprotein-estrogen interaction has been evidenced in the adult rat ovary. The compound responsible for this activity was characterized as nonpolar, dialysable, thermostable and unreactive with anti-17B-estradiol antisera. Fractionation by thin layer chromatography showed that the competitor(s) both by its staining properties and Rf might be a mixture of unsaturated fatty acids. This raises the problem of the complexity of the alpha-fetoprotein-ovarian interaction previously demonstrated.

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