TAILIEUCHUNG - Lecture Molecular biology (Fifth Edition): Chapter 8 - Robert F. Weaver

Chapter 8 - Major shifts in bacterial transcription. In this chapter, students will be able to understand: Sigma factor switching, the RNA polymerase encoded in phage T7, infection of E. coli by phage λ,.and another contents. | Molecular Biology Fifth Edition Chapter 8 Major Shifts in Bacterial Transcription Lecture PowerPoint to accompany Robert F. Weaver Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Major Shifts in Bacterial Transcription Bacteria control the transcription of a very limited number of genes at a time through the use of operons More radical shifts in gene expression require more fundamental changes in the transcription machinery Three major mechanisms: -factor switching RNA polymerase switching antitermination 8- Sigma Factor Switching Phage infection of bacterium subverts host transcription machinery In process, establishes a time-dependent, or temporal, program of transcription First early phage genes are transcribed This is followed by the later genes Late in the infectious cycle there is no longer transcription of the host genes, only phage genes Change in the genes that are transcribed is caused by a change in transcription .

• Sinh học
• Molecular biology
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• Bacterial transcription
• Sigma factor switching
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• The human nuclear genome
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• Molecular cloning methods
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• RNA polymerase structure
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• The λ family of repressors
• Eukaryotic RNA polymerases
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• RNA polymerase II
• Histones in the nucleosome
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