Low Rates of Lateral Gene Transfer among Metabolic Genes Define the Evolving Biogeochemical Niches of Archaea through Deep Time
Figure 3
Cytochrome oxidase in the Crenarchaeota. Phylogenetic trees for (a) cytochrome oxidase subunit I and cytochrome oxidase subunits I+III and (b) cytochrome oxidase subunit II. Putative gene duplication events (e.g., leading to PoxB and PoxH) are indicated using black arrows.