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Applied and Environmental Microbiology, June 2004, p. 3785-3788, Vol. 70, No. 6
0099-2240/04/$08.00+0     DOI: 10.1128/AEM.70.6.3785-3788.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

Stable Carbon Isotopic Fractionations Associated with Inorganic Carbon Fixation by Anaerobic Ammonium-Oxidizing Bacteria

Stefan Schouten,1* Marc Strous,2 Marcel M. M. Kuypers,3 W. Irene C. Rijpstra,1 Marianne Baas,1 Carsten J. Schubert,4 Mike S. M. Jetten,2 and Jaap S. Sinninghe Damsté1

Department of Marine Biogeochemistry and Toxicology, Royal Netherlands Institute for Sea Research, 1790 AB Den Burgh,1 Department of Microbiology, Faculty of Science, University of Nijmegen, 6500 GL Nijmegen, The Netherlands,2 Max Planck Institute for Marine Microbiology, D-28359 Bremen, Germany,3 Limnological Research Center, Swiss Federal Institute for Environmental Science and Technology, CH 6047 Kastanienbaum, Switzerland4

Received 28 November 2003/ Accepted 4 March 2004

Isotopic analyses of Candidatus "Brocadia anammoxidans," a chemolithoautotrophic bacterium that anaerobically oxidizes ammonium (anammox), show that it strongly fractionates against 13C; i.e., lipids are depleted by up to 47{per thousand} versus CO2. Similar results were obtained for the anammox bacterium Candidatus "Scalindua sorokinii," which thrives in the anoxic water column of the Black Sea, suggesting that different anammox bacteria use identical carbon fixation pathways, which may be either the Calvin cycle or the acetyl coenzyme A pathway.


* Corresponding author. Mailing address: Royal Netherlands Institute for Sea Research (NIOZ), Department of Marine Biogeochemistry and Toxicology, P.O. Box 59, 1790 AB Den Burgh, The Netherlands. Phone: 31 222 369565. Fax: 31 222 319674. E-mail: schouten{at}nioz.nl.


Applied and Environmental Microbiology, June 2004, p. 3785-3788, Vol. 70, No. 6
0099-2240/04/$08.00+0     DOI: 10.1128/AEM.70.6.3785-3788.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.




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