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Journal of Clinical Endocrinology & Metabolism, Vol 44, 983-985, Copyright © 1977 by Endocrine Society

ARTICLES

The binding of a synthetic progestin, R5020 to transcortin and serum albumin

DW Chan and WR Slaunwhite Jr

R5020 (17,21-dimethyl-19-nor-4,9-pregnadiene-3,20-dione), a synthetic progestin, was tested for its binding to purified human transcortin, albumin and human serum. Scatchard analysis showed that R5020 bound relatively weakly to transcortin (Kass = 8 X 10(6)M-1); in 20% human serum or albumin greater than 90% was bound with low Kass and an indeterminate number of binding sites.


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M Ip, R. Milholland, F Rosen, and U Kim
Mammary cancer: selective action of the estrogen receptor complex
Science, January 26, 1979; 203(4378): 361 - 363.
[Abstract] [PDF]


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