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Regulatory interaction of photosynthetic nitrate utilization and carbon dioxide fixation in the cyanobacterium Anacystis nidulans |
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| Authors: | Enrique Flores Jose M. Romero Miguel G. Guerrero Manuel Losada |
| Affiliation: | Departamento de Bioquimica, Facultad de Biologia y C.S.I.C., Apartado 1095, Sevilla, Spain |
| Abstract: | The rate of photosynthetic nitrate utilization in Anacystis nidulans is strongly influenced by the availability of carbon dioxide. This dependence can be relieved by inhibiting the metabolism of the ammonium derived from nitrate reduction. Nitrate uptake seems to be modulated through a sensitive regulatory system integrating the photosynthetic metabolism of carbon and nitrogen, with CO2 fixation products antagonizing the inhibitory effect of ammonium derivatives. |
| Keywords: | CO2 fixation Nitrate uptake Photosynthesis (A. nidulans) |
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