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J Bacteriol. Jun 1985; 162(3): 1322–1324.
PMCID: PMC215926

Regulation of nitrogen fixation in Rhodospirillum rubrum grown under dark, fermentative conditions.

Abstract

Rhodospirillum rubrum was shown to grow fermentatively on fructose with N2 as a nitrogen source. The nitrogenase activity of these cells was regulated by the NH4+ switch-off/switch-on mechanism in a manner identical to that for photosynthetically grown cells. In vitro, the inactive nitrogenase Fe protein from fermenting cells was reactivated by an endogenous membrane-bound, Mn2+-dependent activating enzyme that was interchangeable with the activating enzyme isolated from photosynthetic membranes.

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Selected References

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