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Bacterial RNA polymerase core plus a sigma

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Bacterial RNA polymerase core plus a sigma subunit forms the fully active holoenzymeBacterial RNA polymerase core plus a sigma subunit forms the fully active holoenzyme

RNA polymerase Sigma RNA polymerase core enzyme subunit holoenzyme 36.5 kD 4 kD 155 kD 390 l<D One of four kinds 430 l<D molecular molecular in E. co/i; molecular weight. Alternative weight. weights are from sigma subunits give 27 to 70 kD. the holoenzyme specificity for differ- ent promoters.
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