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Optimization of the Sistrom Culture Medium for Large-Scale Batch Cultivation of Rhodospirillum rubrum under Semiaerobic Conditions with Maximal Yield of Photosynthetic Membranes

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PMC
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Abstract

The defined medium A of W. R. Sistrom (W. R. Sistrom, J. Gen. Microbiol. 22:77-85, 1960) has been modified to allow the growth of Rhodospirillum rubrum in large-scale batch cultures under dark, semiaerobic conditions. The simultaneous use of two substrates, NH4-succinate (46 mM) and fructose (0.3%), which are utilized in aerobic and fermentative metabolism, respectively, leads to very high cell densities with a maximal yield of photosynthetic membranes.

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