Comparative genomic organization of genomic fragments affiliated with acidobacterial subdivision 6 (fosmid clones 59, 70, 92, 98, 259, and 270 from this study; fosmid clones with GenBank accession numbers AY281356 and AY281352 from the study of Quaiser et al. [46]; and fosmid clones with GenBank accession numbers EF597689, EU686586, EF597694, EU686638, EU686603, EU686608, and EU795230 from another study of Quaiser et al. [45]). A neighbor-joining tree of 16S rRNA gene sequences is shown on the left as a reference. Sequences are aligned according to the ribosomal operon localization. 16S rRNA and 23S rRNA genes are indicated as gray arrows. Conserved regions between genomic fragments are indicated by gray-shaded areas, with gray intensity being a function of sequence similarity by tBLASTx over lengths greater than 150 bp. Particular ORFs mentioned in the text are highlighted in color.