Fig. 4.

The E.coli/Shigella core genome browser, showing the highly conserved ordering relationships between blocks of the E.coli core genome and the less conserved ordering in Shigella. Most E.coli look like the first snake track (E24377), with no high-level rearrangements (for space only one is shown). In contrast, the Shigella has, with respect to E.coli, a fragmented core genome (second snake track SbCDC 308394, again, only one shown for lack of space)