Explain what an enhancer is and how an enhancer that is located thousands of nucleotides away from the gene it controls can still affect that gene.

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Enhancers are transcription factors, as they bind the DNA at specific sequences to enhance transcription.

Enhancers are the specific sites that bind transcription factors and allow for the interaction of activators.

Enhancers are regions of DNA which allow for normal levels of transcription among the essential genes.

Enhancers are the insulators, as they restrict the interaction of activators and transcription factors.