Abstract
The configuration of quinone systems, cellular fatty acids and diaminopimelic acids in 11 species of thermophilic clostridia which have been classified into new genera based on their 16S rRNA sequences was determined. It was found that menaquinone 7 was present in 10 species as the major component of menaquinone systems by analyses using HPLC with photodiode-array detector and electron impact mass spectrometry. In seven of the 11 species, the major cellular fatty acids were determined to be iso-15:0 and iso-17:0. As a results of chemotaxonomic studies it was demonstrated that the representatives of the new genera Thermoanaerobacter and Thermoanaerobacterium were heterogeneous in their chemical composition, whereas strains of the new genus Moorella and of the new unnamed genus which is composed of (Clostridium) stercorarium and (Clostridium) thermolacticum showed homogeneity in their chemotaxonomic characteristics.
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