The lipoquinones and associated respiratory functions of 34 cultures representing 17 bacterial species hitherto assigned to the genus or were investigated. Strains representing recognized or species regularly contained desmethylmenaquinones and were capable of anaerobic electron transport with fumarate as a terminal acceptor when grown in oxygen-limited cultures. On aeration, the majority of the strains produced ubiquinones in addition to desmethylmenaquinones, with inter- and intraspecific variations. The use of lipoquinone patterns and features indicating fumarate respiration, such as stimulation of oxygen-limited growth by fumarate, in the classification and identification of , and phenotypically similar organisms is discussed.


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