Repressors are the proteins that prevent transcription by impeding the progress of RNA polymerase in the DNA strand. Hence, the DNA cannot be transcribed to mRNA
What is the function of repressor?
The repressor protein works by binding to the promoter region of the genes that prevents the production of mRNA. Repressor proteins are very essential for the regulation of gene expression in cells.
RNA polymerase keep transcribing until it gets signals to stop. The process of ending a transcription is known as termination. It happens once the polymerase transcribes a sequence of DNA known as terminator.
Transcription factors are proteins whose function is to activate transcription of DNA by binding to a specific DNA sequences. Transcription factors that are activators also boost the transcription of genes. Repressors decrease transcription and groups of transcription factor binding sites called enhancers and silencers can turn a gene on/off in some particular part of the body.
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