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Science 4 January 2002:
Vol. 295. no. 5552, pp. 117 - 119
DOI: 10.1126/science.1066577
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Reports

Intracellular Iron Minerals in a Dissimilatory Iron-Reducing Bacterium

Susan Glasauer,* Sean Langley, Terry J. Beveridge

Among prokaryotes, there are few examples of controlled mineral formation; the formation of crystalline iron oxides and sulfides [magnetite (Fe3O4) or greigite (Fe3S4)] by magnetotactic bacteria is an exception. Shewanella putrefaciens CN32, a Gram-negative, facultative anaerobic bacterium that is capable of dissimilatory iron reduction, produced microscopic intracellular grains of iron oxide minerals during growth on two-line ferrihydrite in a hydrogen-argon atmosphere. The minerals, formed at iron concentrations found in the soil and sedimentary environments where these bacteria are active, could represent an unexplored pathway for the cycling of iron by bacteria.

Department of Microbiology, College of Biological Science, University of Guelph, Guelph, Ontario N1G 2W1, Canada.
*   To whom correspondence should be addressed. E-mail: sglasaue{at}micro.uoguelph.ca

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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Mineralogical characterization and genesis of hydrothermal Mn oxides from the flank of the Juan the Fuca Ridge.
M.D. Buatier, D. Guillaume, C.G. Wheat, L. Herve, and T. Adatte (2004)
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Isotopic Constraints on Biogeochemical Cycling of Fe.
C. M. Johnson, B. L. Beard, E. E. Roden, D. K. Newman, and K. H. Nealson (2004)
Reviews in Mineralogy and Geochemistry 55, 359-408
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Identification of Organelles in Bacteria Similar to Acidocalcisomes of Unicellular Eukaryotes.
M. Seufferheld, M. C. F. Vieira, F. A. Ruiz, C. O. Rodrigues, S. N. J. Moreno, and R. Docampo (2003)
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Science. ISSN 0036-8075 (print), 1095-9203 (online)