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Microbial diversity, as assessed by DGGE, of bacterial community within microcosms amended with both 10 mM acetate and 10 mM sodium arsenate. Arrows denote the presence of bands thought to represent named species, as assessed via comparison to the DGGE profiles of cloned and sequenced 16S rRNA gene fragments. The closest relative in GenBank is shown in brackets (see Table S3 in the supplemental material). Numbers at bottom denote days of incubation. C. delicatus, Curvibacter delicatus.
