What are the three mechanisms by which transcription factors regulate eukaryotic gene expression

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22-05-2018
Biology

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What are the three mechanisms by which transcription factors regulate eukaryotic gene expression

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Diatonic254 Diatonic254 · Answer 1 · 2018-05-31T07:56:24+02:00

1. They act as activators of transcription. This is through increasing the affinity of the RNA polymerase on the promoter

2. They could act as repressors. This way, when they bind to their active sites, they repress the binding of the RNA polymerase on the promoter

3. Transcription factors at one site could affect transcription of genes on another site on the DNA. The flexibility of the DNA (by forming loops) allows for this phenomenon.