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Maximum likelihood tree showing the phylogenetic relationships of ∼1,400 bp of the 16S rRNA gene sequences of 21 species obtained in this study using culture-dependent method. The numbers at the branch points are bootstrap values based on 1,000 replicates. The cutoff values lower than 50% are not shown. All species were classified into three phyla: (A) Proteobacteria, (B) Firmicutes, and (C) Bacteroidetes. The corresponding family taxa are indicated in the front of branches.
