Circular map of the E. coli W chromosome. The outer circle shows position in bp. The second, third and fourth circles (blue) show forward ORFs, reverse ORFs, and pseudogenes, respectively. The fifth circle (green) shows pseudoknots. The seventh circle shows large mobile elements (see Table 2 for details); pLEs are in green and prophages are in red. The inner circle shows a plot of G+C content, with purple being G+C and tan being A+T.