FIG 1.
Comparative circular map of 12 strains of Staphylococcus aureus. Red bars outside the circle indicate the positions of the seven MLST loci (Enright et al. 2000, Feil et al. 2003). The outer circle represents conserved (blue) and highly variable (gray) regions, respectively. In the second circle, the distribution of synonymous nucleotide diversity, πS, is shown in green. The third circle shows the distribution of the GC content at third positions of codons in magenta. The fourth and fifth circles are for the positions of genes with forward (cyan) and reverse (orange) orientations, respectively. Most genes in the left half of the circular genome have forward orientations and vice versa, consistent with other bacteria (Rocha 2004, Bentley and Parkhill 2004).