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Neighbor-joining tree showing the phylogenetic position of Bacteroides sp. strain D8 among recognized members of the genus Bacteroides based on 16S rRNA gene sequences. The 16S rRNA gene sequence of Prevotella melaninogenica was used as an outgroup to root the tree. Bootstrap values are indicated at branch points of interest. A GenBank database accession number is included for each sequence in the phylogenetic tree. Bar = 10% sequence divergence.
