Roger Whittenbury

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More than IOO Gram-negative, strictly aerobic, methane-utilizing bacteria were isolated. All used only methane and methanol of the substrates tested for growth. The organisms were classified into five groups on the basis of morphology, fine structure, and type of resting stage formed (exospores and different types of cysts) and into subgroups on other(More)
The use of acetylene as a convenient assay substrate for nitrogenase in methane oxidising bacteria is complicated by the observation that it is a potent inhibitor of the methane monooxygenase enzyme in both whole cells and cell-free extracts. If the cells were provided with alternative oxidisable carbon substrates other than methane then nitrogen fixing(More)
Cell-free extracts of methane-utilizing bacteria (methylobacteria) were examined for the presence of enzymes of the tricarboxylic acid cycle. Representative organisms of the Type II group had a complete set of enzymes for the operation of this cycle. Members of the Type I group lacked α-ketoglutarate dehydrogenase. All the methylobacteria examined had an(More)
Rhodopseudomonas palustris and Rh. viridis were found to reproduce by budding. The differences between budding reproduction and binary fission were discussed, and it was concluded that there was a lack of evidence to indicate a fundamental difference between the two processes in bacteria. Taxonomic and nomenclatural changes were discussed.