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Neighbor-joining tree of subdivision 6 of the Acidobacteria, highlighting the sequences recovered by this and two other metagenomic studies (45, 46). Names in italics indicate sequences retrieved from GenBank. Green, this study and soil metagenome library (46); blue, deep-sea metagenomic library (45). Numbers near nodes indicate bootstrap values. Sequences from subdivision 4 were used as an outgroup.
