Journal
JOURNAL OF BACTERIOLOGY
Volume 189, Issue 22, Pages 8392-8396Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/JB.00821-07
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Funding
- NIGMS NIH HHS [R01 GM036890, GM36890] Funding Source: Medline
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We used gfp transcriptional fusions to investigate the regulation of eight sigma factor genes during heterocyst development in the cyanobacterium Anabaena sp. strain PCC 7120. Reporter strains containing gfp fusions with the upstream regions of sigB2, sigD, sigI, and sigJ did not show developmental regulation. Time-lapse microscopy of sigC, sigE, and sigG reporter strains showed increased green fluorescent protein fluorescence in differentiating cells at 4 h, 16 h, and 9 h, respectively, after nitrogen step down.
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