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Ontogeny of the estrogen receptor during early uterine development.

Authors
Type
Published Article
Journal
Science
0036-8075
Publisher
American Association for the Advancement of Science (AAAS)
Publication Date
Volume
169
Issue
3940
Pages
76–78
Identifiers
PMID: 5447534
Source
Medline

Abstract

The number of estrogen binding sites in uterine cytoplasm on a per cell basis reaches a maximum by day 10 of life in both intact and castrate female rats. After this peak is reached, the number of binding sites per cell decreases, and the ratio remains constant until days 22 to 23 of life. Thus, the ontogeny of the estrogen binding protein is not dependent upon estrogen from the ovary and is probably an autonomous property of uterine cells. Sedimentation values and dissociation constants of the protein when the animals are 5 to 10 days of age are similar to those of the 22-day-old animal, indicating that the same protein is present throughout postnatal development.

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