Abstract
Chromatium, an obligate photosynthetic anaerobe belonging to the purple sulphur bacteria (Thiorhodaceae), has been examined by several workers for the presence of lipophilic quinones. Thus, Chromatium, strain D, contains ubiquinone-35 (UQ7; 2.7 µM/g, dry wt.) and a vitamin K (refs. 1 and 2); both these quinones were found in the chromatophores2. Chromatium 8379 was reported as having large amounts of ubiquinone-50 (UQ10) and a vitamin K2 (ref. 3). Recently we have had the opportunity of examining C. vinosum for the presence of ubiquinone and vitamin K and have established the chain-length of the quinones present.
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OSNITSKAYA, L., THRELFALL, D. & GOODWIN, T. Ubiquinone-40 and Vitamin K2 (40) in Chromatium vinosum. Nature 204, 80–81 (1964). https://doi.org/10.1038/204080b0
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DOI: https://doi.org/10.1038/204080b0
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