FIG 2 .

Overview of the intergenic region upstream of phuR. The alignment shows homologue sequences from different isolates with genetic variants highlighted in bold. Wild-type sequences of P. aeruginosa strains PAO1, DK1, DK2, and C are shown at the top of the alignment. Abbreviations of sequence alleles from different isolates are indicated in parentheses (WT and M1 to M10). Positions of promoters and a Fur box are indicated with black lines above the alignment (the phuSTUVW promoter is only partially shown). Positions are relative to the start codon of phuR.