Comparison of the genome regions surrounding aatA of IMT5155, APEC_O1, B_REL606 and BL21. In total we sequenced 6,154 bp of the strain IMT5155 including the aatA gene, 1,072 bp upstream and 1,584 bp downstream of aatA. Our sequence was compared with the comparable 6,154 bp genome regions of the sequenced strains harbouring aatA homologs: APEC_O1, B_REL606 and BL21. Open reading frames (ORFs) are shown as arrows. White arrows represent known genes, predicted ORFs are shown in grey and insertion sequences or an ORF encoding a putative transposase are indicated in black. IS2i: interrupted insertion sequence.