Relative genomic plasticity of the genomes used for metabolic inference.

<p>Colors correspond to the level of plasticity, which is also given by the y-axis. X-axis is labeled according to terminal node order for the representative 16S rRNA gene from each genome on a phylogenetic tree rooted at the node ancestral to the Archaea and <i>Planctomyces</i> (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0135868#pone.0135868.s004" target="_blank">S1 File</a>). Note that terminal node order on this rooted tree does not correspond to edge numbers on the unrooted tree used for phylogenetic placement (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0135868#pone.0135868.s005" target="_blank">S2 File</a>). Arrows indicate strains or clades with exceptional plasticity, the majority of which are known symbionts. I) <i>Nanoarcheum equitans</i> II) the <i>Mycobacteria</i> III) a butyrate producing bacterium within the <i>Clostridium</i> IV) <i>Candidatus Hodgkinia circadicola</i> V) the <i>Mycoplasma</i> VI) <i>Sulcia muelleri</i> VII) <i>Portiera aleyrodidanum</i> VIII) <i>Buchnera aphidicola</i>, IX) the <i>Oxalobacteraceae</i>.