Transcription repression near the promoter region.
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Transcription repression near the promoter region.
Molecules can interfere with RNA polymerase binding. An inactive repressor protein (blue) can become activated by another molecule (red circle). This active repressor can bind to a region near the promoter called an operator (yellow) and thus interfere with RNA polymerase binding to the promoter, effectively preventing transcription.
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In multicellular organisms, nearly all cells have the same DNA, but different cell types express distinct proteins. Learn how cells adjust these proteins to produce their unique identities.
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