Intrinsic disorder and phylogenetic tree of Archaea. This schematic figure is made manually by taking the figure in http://archaea.ucsc.edu as a template. Several species not analyzed in our study were removed. Distances between very similar species were also intentionally increased. Numbers nearby the species name represent the relative content of disordered residues in that species. Colors of the tree are assigned according to the abundance of disordered residues (red:>30%; orange: >21%; yellow: >17%; light blue: >14%; dark blue:<=14%).