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Cupriavidus necator
''Cupriavidus necator'' is a Gram-negative soil bacterium of the Betaproteobacteria class.
==Taxonomy==
''C. necator'' has gone through a series of name changes. In the first half of the 20th century, many microorganisms were isolated for their ability to use hydrogen. Hydrogen-metabolizing chemolithotrophic organisms were clustered into the group ''Hydrogenomonas''. ''C. necator'' was originally named ''Hydrogenomonas eutrophus'' because it fell under the ''Hydrogenomonas'' classification and was “well nourished and robust”. Some of the original ''H. eutrophus'' cultures isolated were by Bovell and Wilde. After characterizing cell morphology, metabolism and GC content, the ''Hydrogenomonas'' nomenclature was disbanded because it comprised many species of microorganisms.〔 ''H. eutrophus'' was then renamed ''Alcaligenes eutropha'' because it was a micro-organism with degenerated peritrichous flagellation.〔 Investigating phenotype, lipid composition, fatty acid composition and 16S rRNA analysis, ''A. eutropha'' was found to belong to the genus ''Ralstonia'' and named ''Ralstonia eutropha''.〔 Upon further study of the ''Ralstonia'' genus, ''Ralstonia'' was found to comprise two phenotypically distinct clusters. The new genus ''Wautersia'' was created from one of these clusters which included ''R. eutropha''. In turn ''R. eutropha'' was renamed ''Wautersia eutropha''. Looking at DNA-DNA hybridization and phenotype comparison with ''Cupriavidus necator'', ''W. eutropha'' was found to be the same species as previously described ''C. necator''. Because ''C. necator'' was named in 1987 far before the name change to ''R. eutropha'' and ''W. eutropha'', the name ''C. necator'' was assigned to ''R. eutropha'' according to Rule 23a of the International Code of Nomenclature of Bacteria.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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