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An Escherichia coli mutant temperature sensitive for the sigma subunit of ribonucleic acid polymerase was shifted to restrictive temperatures. In response to these restrictions the transcription of rpoBC increased markedly, and the synthesis rates of the beta and beta' subunits of ribonucleic acid polymerase increased. The ratio of the beta and beta' synthesis rates (beta/beta') decreased.

journal of bacteriology

Regulation of ribonucleic acid polymerase synthesis during restriction of an Escherichia coli mutant temperature sensitive for transcription factor sigma