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* השאלה נוספה בתאריך: 18-12-2020

		contains the 3’ to 5’ proofreading activity.
		determines the accuracy of transcription.
		binds to specific DNA sequences.
		is released from the polymerase holoenzyme after the first few nucleotides have been joined.
		is an elongation factor.
		catalyses phosphodiester bond formation.

The sigma polypeptide of the prokaryotic transcription holoenzyme