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Journal of Bacteriology, February 2003, p. 1116-1119, Vol. 185, No. 3
0021-9193/03/$08.00+0     DOI: 10.1128/JB.185.3.1116-1119.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Expression of Primary Sigma Factor (PSF) and PSF-Like Sigma Factors in the Cyanobacterium Synechocystis sp. Strain PCC 6803

Ilona Tuominen, Esa Tyystjärvi, and Taina Tyystjärvi*

Plant Physiology and Molecular Biology, Department of Biology, University of Turku, FIN-20014 Turku, Finland

Received 28 August 2002/ Accepted 13 November 2002

Large amounts of sigA mRNA, encoding the primary {sigma} factor (PSF) in Synechocystis sp. strain PCC 6803, accumulated under standard growth conditions, while stress conditions like heat or high salinity led to a rapid decrease in sigA mRNA content. The sigB, sigC, sigD, and sigE genes, encoding PSF-like {sigma} factors, were under strict physiological control.

* Corresponding author. Mailing address: Plant Physiology and Molecular Biology, Department of Biology, University of Turku, FIN-20014 Turku, Finland. Phone: 358-2-3338078. Fax: 358-2-3338075. E-mail: taityy{at}utu.fi.

Journal of Bacteriology, February 2003, p. 1116-1119, Vol. 185, No. 3
0021-9193/03/$08.00+0     DOI: 10.1128/JB.185.3.1116-1119.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.



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