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Lisa Carius, Oliver Hädicke and Hartmut Grammel Stepwise reduction of the culture redox potential allows the analysis of microaerobic metabolism and photosynthetic membrane synthesis in Rhodospirillum rubrum Biotechnology and Bioengineering 110

Article first published online: 11 OCT 2012 | DOI: 10.1002/bit.24734

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By applying reduction steps to the culture redox potential (CRP in mV) the authors investigated metabolic and regulatory events responsible for the microaerobic formation of highly pigmented photosynthetic membranes (PM)in R. rubrum. As indicated by the photographs, the purple color of these bacteria reflects the amount of membranes produced. The authors argue that the available electron source, the activity of the terminal oxidases and the direction of the TCA cycle alter the intracellular redox state and thus influence PM production in R. rubrum.

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