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Distinct and differently regulated Mo-dependent nitrogen-fixing systems evolved for heterocysts and vegetative cells of Anabaena variabilis ATCC 29413: characterization of the fdxH1/2 gene regions as part of the nif1/2 gene clusters |
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| Authors: | Bernhard Schrautemeier Ute Neveling Stefan Schmitz |
| Institution: | Botanisches Institut der Universität Bonn, Kirschallee 1, 53115 Bonn, Germany. |
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