Overall organization of the cps cluster of K. pneumoniae Kp13. The cpsKp13 spans galF to wzy. ORFs are represented by arrows (gray for those encoding glycosyltransferases and double-headed for possible mobile elements). Rectangles above the ORFs represent distinct variably conserved regions of the cps cluster as discussed in the text. A plot of the GC content of the region using a 100-bp sliding window is shown below. The dashed horizontal line represents the mean GC content of the entire Kp13 chromosome.