Fig. 2

Pan-chromosome and fGIs. The core gene cluster (cGC), flexible gene cluster (fGC) and flexible genomic region (fGR) locations of the A. baumannii pan-genome (a) were computed from PanOCT output and are illustrated as a circle where each concentric circle is numbered from the outermost to the innermost circle (b). fGR locations are depicted in circles 1 (>20,000 bp), 2 (10,001–20,000 bp), and 3 (1000–10,000 bp) on a core backbone of genes in circles 4 (positive strand) and 5 (negative strand). Refer to the key for details on color representations, circle number and bar height. Key fGRs are noted by black numbering and letters K (K-antigen), N (Novel), and O (O-antigen) as in Table 2. Gray numbers indicate positions on the pan-chromosome in megabase pairs. Predicted functions are noted in gray words and the following abbreviations: RI resistance island, GI genomic island, ɸ phage. Genes associated with RI insertions are labeled in gray and indicated by a black line. The frequency of individual fGIs within six size class bins was also determined (c)