Conservation of gene order in prokaryotic genomes in relation to phylogenetic distance, measured as the number of substitutions in SSU rRNA. Each point represents a pair of species. (a) Results for all species. (b) Same plot as in (a), but with Archaea removed and values for some bacterial species highlighted.
Tamames Genome Biology 2001 2:research0020.1-research0020.11 doi:10.1186/gb-2001-2-6-research0020