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  • Title: Transcription of the ADH2 gene in Saccharomyces cerevisiae is limited by positive factors that bind competitively to its intact promoter region on multicopy plasmids.
    Author: Irani M, Taylor WE, Young ET.
    Journal: Mol Cell Biol; 1987 Mar; 7(3):1233-41. PubMed ID: 3550434.
    Abstract:
    Transcription of the ADH2 gene in the yeast Saccharomyces cerevisiae was inhibited by excess copies of its own promoter region. This competition effect was promoter specific and required the upstream activation sequence of ADH2 as well as sequences 3' to the TATA box. Introducing excess copies of ADR1, an ADH2-specific regulatory gene, did not alleviate the competition that was observed in these circumstances during both constitutive and derepressed ADH2 expression. Excess copies of the upstream region did not release ADH2 from glucose repression, consistent with the view that ADH2 is regulated by positive trans-acting factors.
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