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RNA polymerase σ α 2 ββ’ Core enzyme σ promoter DNA α 2 ββ’ Transcription in Procaryotes.

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Presentation on theme: "RNA polymerase σ α 2 ββ’ Core enzyme σ promoter DNA α 2 ββ’ Transcription in Procaryotes."— Presentation transcript:

1 RNA polymerase σ α 2 ββ’ Core enzyme σ promoter DNA α 2 ββ’ Transcription in Procaryotes

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3 RNA polymerase σ α 2 ββ’ Core enzyme σ promoter DNA α 2 ββ’ σ factor ： rpoD rpoH rpoN… 等 Regulation

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5 Figure 9.03

6 Heat shock proteins

7 lac operon

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10 araBAD operon

11 What do we mean by the 5´ end of a gene? Since DNA has two antiparallel strands it has no actual polarity. mRNA does have polarity since it is single stranded. The 5´ end refers to the mRNA molecule and since it is copied from the DNA by standard base pairing the 5´ end of a gene is the 3´ end of the template strand.

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