Fig. 3.

Phylogenetic tree showing the placement of Ca. Phosphitivorax anaerolimi Phox-21 within the Deltaproteobacteria. Selected 16S rRNA sequences were aligned using the Silva aligner, and a maximum likelihood phylogenetic tree was constructed with 1,000 bootstrap resamplings using RAxML-HPC. Members of the Acidobacteria were included as an outgroup. Taxa represented in the Silva reference database were assigned to known orders within the Deltaproteobacteria based on their Greengenes taxonomic assignments. GenBank accession numbers are provided in parentheses. Taxa for which there is experimental evidence of DPO activity are indicated in bold. Internal nodes with bootstrap support of >70% are indicated by closed circles and those with support of >50% by open diamonds. (Scale bar: 0.1 change per nucleotide.)