Biochemical characterization of glutamine synthetase from the diazotrophic cyanobacterium,Anabaena doliolum
β Scribed by P. S. Bisen; S. Shanthy
- Publisher
- Springer
- Year
- 1992
- Tongue
- English
- Weight
- 446 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0343-8651
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## Abstract Growth and urea regulation of heterocyst and nitrogenase formation have been studied in the diazotrophic cyanobacterium __Anabaena cycadeae__ and its glutamine auxotrophic mutant strain lacking glutamine synthetase (GS) activity. The parent strain having normal GS activity utilized urea
Nitrate uptake and reductase activities of the cyanobacterium Anabaena cycadeae and its mutant, lacking glutamine synthetase, (the glutamine auxotroph) were measured. The levels of both these enzymes were up to 25-fold higher in the mutant than in the parent (Anabaena cycadeae). The data indicate op