A progesterone-modulated, low-molecular-weight protein from the uterus of the sheep is associated with crystalline inclusion bodies in uterine epithelium and embryonic trophectoderm

A protein of Mr 14,000 (14K protein) has been identified in the medium after culturing sheep conceptuses in vitro. However, it was also a component of uterine flushes of nonpregnant ewes during the luteal phase of the estrous cycle. The 14K protein, which consists of several isoforms, was purified f...

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