Nucleic Acids Research, 1983, Vol. 11, No. 5 1361-1373
© 1983
MOLECULAR BIOLOGY |
Methylation of the chicken vilellogenin gene: influence of estradiol administration
Department of Biochemistry, Groningen University Nijenborgh 16, 9747 AG Groningen, The Netherlands
Received December 15, 1982. Revised February 16, 1983. Accepted February 16, 1983.
The degree of methylation of the chicken vitellogenin gene has been investigated. Upon induction by administration of estradiol to a rooster, methyl groups at specific sites near the 5'-end of the gene are eliminated. The process of demethylation is slower than the activation of the gene. Demethylation is therefore probably not a prerequisite to gene transcription. At least two other sites in the coding region of the gene are methylated in the liver of estrogenized roosters, but not in the liver of a laying hen, where the gene is naturally active.
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