Once an RNA polymerase has initiated transcription, it will release the sigma factor or sigma subunit and bind other proteins known as elongation factors before it begins moving down the DNA template doing strand elongation. Briefly explain why this is necessary - why can't RNA polymerase + sigma factor do all of transcription? Be specific.
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Once an RNA polymerase has initiated transcription, it will release the sigma factor or sigma subunit and bind other proteins known as elongation factors before it begins moving down the DNA template doing strand elongation. Briefly explain why this is necessary - why can't RNA polymerase + sigma factor do all of transcription? Be specific.
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