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Niche-Specific Features of the Intestinal Bacteroidales ^,

Channing Laboratory, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts

Received 27 September 2007/ Accepted 28 October 2007

By analyzing the genomic sequences of 12 Bacteroidales species, we found that all intestinal species have numerous polysaccharide biosynthesis loci, many with promoters that we demonstrate undergo DNA inversion. This feature is not conserved in the Bacteroidales order as a whole, as oral species do not share these genetic features.

Published ahead of print on 9 November 2007.

Supplemental material for this article may be found at http://jb.asm.org/.

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