RNA polymerase sigma factor SigA

UniProtKB accession:  P06224

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UniProtKB description:  Sigma factors are initiation factors that promote the attachment of RNA polymerase (RNAP) to specific initiation sites and are then released. This sigma factor is the primary sigma factor during all growth phases, stress and during sporulation. It associates with the RNAP core at all growth stages with a slight increase in stationary phase.