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. 1975 Sep;72(9):3364-8.
doi: 10.1073/pnas.72.9.3364.

Effect of estrogen on gene expression: purification of vitellogenin messenger RNA

Effect of estrogen on gene expression: purification of vitellogenin messenger RNA

W Wetekam et al. Proc Natl Acad Sci U S A. 1975 Sep.

Abstract

We report initial studies on estrogen-mediated regulation of egg yolk protein synthesis in the rooster. Egg yolk proteins are normally synthesized as a large precursor, vitellogenin, in the liver of the laying hen; roosters synthesize vitellogenin only when treated with estrogen. Polysomal RNA from the liver of estrogen-treated roosters was translated in a reticulocyte cell-free system, and the newly synthesized proteins were identified by a highly specific and sensitive indirect immunoprecipitation reaction. The messenger RNA that specifies vitellogenin has been purified more than 800-fold from rooster liver polysomal RNA by a combination of methods, including immunoprecipitation of polysomes and chromatography of RNA on poly(U)-Sepharose.

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