Fig. 3.

a Map of E. coli mobile DNA elements (inside) and S. Typhimurium mobile elements (outside). E. coli includes multiple copies of insertion sequence 1 (IS1; 1A–H), IS2 (2A–H), IS3 (3A–F), IS5 (5A–R), IS30 (30A–C), IS150 (150), IS186 (186A–C), IS600 (600), and IS911 (911A–B). In Salmonella Typhimurium LT2 there are six copies of IS200 (200A–F) in addition to four lysogenic plaque-forming prophages, namely, Fels-1, Gifsy-2, Gyfsy-1, and Fels-2, shown in purple in clockwise order. b The positions of the 27 most highly transcribed protein operons are shown in black and those of the seven ribosomal RNA operons are shown in blue. Steady-state RNA/DNA level for the protein-encoding genes from microarray experiments in exponential phase on LB medium are listed following the gene name