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Direct Observation of Single RNA Polymerase Processing through a Single Endogenous Gene in a Living Yeast Cell



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Rapid advances in live-cell imaging have now enabled direct observation of the transcription of single nascent mRNA molecules from an endogenous yeast gene. A novel quantitative fluctuation analysis of fluorescently labeled mRNA revealed the kinetics of transcription initiation and the dynamics of elongation and termination (see picture; GFP=green fluorescent protein, PP7 is a bacteriophage coat protein, RNAPII=RNA polymerase II, TF=transcription factor).