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Unweighted pair group method with arithmetic mean (UPGMA) cluster analysis of the relatedness of PCR denatured gradient gel electrophoresis (PCR-DGGE) banding patterns from BAC samples before before phenol acclimation (0A, 0B, 0C, and 0D) and from the final enrichment cultures (50A, 50B, 50C, and 50D).
