You are studying a group of cells and found that transcription factor fox promotes expression of the gene hound. You find a group of cells that have abundant amounts of the protein fox but do not express any of the protein hound. What is the most likely explanation for your findings?
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Transcription factors are proteins that help turn specific genes "on" or "off" by binding to nearby DNA.
Transcription factors that are activators boost a gene's transcription. Repressors decrease transcription.
Groups of transcription factor binding sites called enhancers and silencers can turn a gene on/off in specific parts of the body.
Transcription factors allow cells to perform logic operations and combine different sources of information to "decide" whether to express a gene.
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