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Hydrogen oxidizing bacteria
Hydrogen oxidizing bacteria, or sometimes ''Knallgas''-bacteria, are bacteria that oxidize hydrogen as a source of energy with oxygene as final electron acceptor. See microbial metabolism (hydrogen oxidation). These bacteria include ''Hydrogenobacter thermophilus'', ''Hydrogenovibrio marinus'', and ''Helicobacter pylori''.〔Olson JW and Maier RJ (2002) Molecular hydrogen as an energy source for Helicobacter pylori. Science 298:1788-90. (full text )〕 There are both Gram positive and Gram negative knallgas bacteria.
Most grow best under microaerophilic conditions. They do this because the hydrogenase enzyme used in hydrogen oxidation is inhibited by the presence of oxygen, but oxygen is still needed as a terminal electron acceptor.
The word "''Knallgas''" is Swedish and German for "bang-gas" and means a mixture of hydrogen and oxygen: see oxyhydrogen.
==References==
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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