Figure 1

Physical maps of the fhlA-nlpD intergenic region of E. coli strains as determined by publicly available sequences (EDL933, GenBank NC_002655; MG1655, U00096; CFT073, AE014075; E2348/69, FM180568), showing positions of ORFs and location of o454-nlpD pattern sequences and sizes amplified by PCR; the position of oligonucleotide primers (F?=?forward; R?=?reverse) are indicated and the length of fragments amplified from different strains and primer combinations are provided in Table 1 .