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WHAT IS THE FUNCTION OF THE SIGMA SUBUNIT?

S.BIO

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10 years ago

WHAT IS THE FUNCTION OF THE SIGMA SUBUNIT?

WHAT IS THE FUNCTION OF THE SIGMA SUBUNIT?

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padre

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10 years ago

A sigma factor (σ factor) is a protein needed only for initiation of RNA synthesis. It is a bacterial transcription initiation factor that enables specific binding of RNA polymerase to gene promoters. The specific sigma factor used to initiate transcription of a given gene will vary, depending on the gene and on the environmental signals needed to initiate transcription of that gene. Every molecule of RNA polymerase holoenzyme contains exactly one sigma factor subunit.

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