Progesterone and uteroglobulin molecules

Progesterone and uteroglobulin molecules

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Credit: J.C. REVY, ISM/SCIENCE PHOTO LIBRARY

Caption: Progesterone and uteroglobulin. Molecular computer model of the possible interaction between progesterone, the female sex hormone, with uteroglobulin, a uterine protein. The mechanism follows the "lock and key" principle. The key, progesterone (centre, with yellow molecular surface) fits into a "keyhole" receptor site in the surface of the uteroglobulin molecule, the surface of which is modelled in pink. Coloured stick forms represent uteroglobulin's atomic backbone. Uteroglobulin is a protein comprised of 140 amino acids. Its function is obscure; one possible action is in the transportation of progesterone between the uterus and embryo.

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Keywords: biochemical, biochemistry, chemical, chemistry, compound, compounds, hormone action, lock and key, molecule, molecules, progesterone, uteroglobulin

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