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. 1983 Jul;155(1):427–431. doi: 10.1128/jb.155.1.427-431.1983

The structural nif genes of the cyanobacteria Gloeothece sp. and Calothrix sp. share homology with those of Anabaena sp., but the Gloeothece genes have a different arrangement.

T Kallas, M C Rebière, R Rippka, N Tandeau de Marsac
PMCID: PMC217699  PMID: 6305921

Abstract

Probes carrying the Anabaena sp. strain PCC 7120 nitrogenase reductase (nifH) and nitrogenase (nifK and nifD) genes were hybridized to Southern blots of DNA from the unicellular, aerobic nitrogen-fixing cyanobacterium Gloeothece sp. strain PCC 6909 and from the filamentous cyanobacterium Calothrix sp. strain PCC 7601. These data suggest that the Gloeothece sp. nif structural proteins must be similar to those of other diazotrophs and that the ability for aerobic nitrogen fixation does not reside in the nif protein complex. We also found that the nif structural genes of Gloeothece sp. are clustered, whereas those of Calothrix sp. are arranged more like those of Anabaena sp.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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