Chromosome of P. aeruginosa strain 97 used as reference for BLAST alignments. In the circularized chromosome, CG skew and GC content are indicated (two innermost circles), as well as annotated coding sequences (CDS; red arrows, outermost circle) with acquired resistance genes (lilac). Arcs showing GIs (orange), integrons (green), intact (dark gray), or questionable (light gray) prophages are shown in the next circles. In the BLAST comparisons with the selected genomes from phylogenetic main groups 1 (red), 2 (blue), and 3 (green), DNA identity (50 to 100%) to the reference is visualized by the given color codes, with missing regions appearing as white. The map was constructed using BRIG software (http://brig.sourceforge.net/).