FIG. 2.

(A) Reductive dechlorination of 2,3,5,6-CB in sediment-free Baltimore Harbor enrichment cultures with a mixture of three fatty acids as carbon sources. Sediment was removed by dilution after four sequential transfers. The enrichment culture was sampled for phylogenetic analysis prior to the onset of dechlorination (preactive, day 102) and during ortho dechlorination (active, day 240). (B) Community profiles of bacterial 16S rDNA clones from sediment-free Baltimore Harbor enrichment cultures prior to (■) and following (□) the onset of ortho dechlorination. (C) Community profiles of archaeal 16S rDNA clones from sediment-free Baltimore Harbor enrichment cultures prior to (■) and following (□) the onset of ortho dechlorination.