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Unrooted phylogenetic trees of 16S rDNA clones from the beta proteobacteria (A) and the CF cluster (B) retrieved from the various treatments and from the reservoir. Brackets indicate sequences targeted by FISH probes R-BT065 and R-FL615. Superscripts indicate that sequences with identical restriction patterns were also found in clone libraries from reservoir samples (a) and the 5-μm treatment (b). Scale bars indicate 10% estimated sequence divergence.
