Dna

Recognition .-site

Recognition .-site

Termination .-eite

B) Absence of anti-termination factor j Transcribed region_|

DNA Promoter Rscognition Termination eite eite

FIGURE 9.26 Operation of Anti-Termination Factor

A) Transcription of the DNA begins with the RNA polymerase bound to the promoter. B) In the absence of an anti-terminator factor, the RNA polymerase reaches the terminator region and drops off, having transcribed a short RNA. C) In the presence of an anti-termination factor, the RNA polymerase binds the factor when it reaches the recognition site. The factor allows the RNA polymerase to transcribe through the termination site.

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