Figure 5.

Interspecies FCA for the four groups of species considered. (a) Native genes; (b) LTG; (c) IS; and (d) codons are presented separately in superimposable figures. The first two axes, which represent 22.98% and 7.29%,, respectively, of the total variability, are shown. Ellipses represent 90% of the points of each cloud. The arrows in (b) and (c) represent the displacement of the center of the ellipse relative to that of the native genes. Phages were not included in the present analysis because no sequences were found in the H. pylori and the S. pneumoniae genomes. In (d), green squares represent A+T-rich codons and purple squares G+C-rich codons.