FIG. 2.

Map of the APEC O1 chromosome and comparison of APEC O1's genome to those of other ExPEC strains. The outer ring shows genomic islands, as numbers (1 to 43) corresponding to those in Table 5; the 2nd and 3rd rings are coding regions in forward and reverse orientation (blue, backbone ORFs also present in K-12; dark orange, ORFs absent from K-12 but present in all other sequenced ExPEC strains; light orange, ORFs absent from K-12 but present in APEC O1 and two other ExPEC strains; lavender, ORFs absent from K-12 but present in APEC O1 and one other ExPEC strain; yellow, ORFs present only in APEC O1); the 4th ring depicts the scale in base pairs; the 5th ring depicts tRNA genes in dark purple; the 6th ring depicts ORFs unique to APEC O1 in yellow; the 7th ring depicts ORFs common to all sequenced ExPEC strains in orange; the 8th ring shows sliding G+C content compared to the overall average of 50.6%; and the 9th, 10th, and 11th rings show genome alignments of APEC O1 with UTI89 (light blue), 536 (light purple), and CFT073 (light green), respectively.