FIG. 2.

Phylogenetic analysis (neighbor joining) of Chloroflexi 16S rRNA genes. Tree reconstruction was based on 998 positions between E. coli, positions 44 and 1232, from published sequences. The tree is rooted with Bacillus subtilis (AB016721). Bootstrap analysis was performed using the PHYLIP software package (15), and values of >50 are indicated at the branch points. The scale bar indicates 10 substitutions per 100 nucleotide positions. Microorganisms that are confirmed dechlorinators are italicized.