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Science 29 November 2002:
Vol. 298. no. 5599, p. 1675
DOI: 10.1126/science.298.5599.1675l
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This Week in Science

A major cause of gastritis, peptic ulcers, and certain cancers is the bacterium Helicobacter pylori. Olson and Maier (p. 1788) show that the colonization success of this common pathogen is boosted by hydrogen gas produced by other intestinal occupants. Molecular hydrogen in the mucous lining of the stomach stimulates the pathogen to produce more of a constitutive enzyme, hydrogenase, required to harvest the energy through a series of heme-containing electron carriers.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)