FIG. 1.

(A) Schematic drawing of the genetic organization of the aot-arg locus on the chromosomes of P. aeruginosa PAO1 and its derivatives. The insertion sites of antibiotic cassettes and transposon Tn5-751 are indicated. (B) Nucleotide sequence of the promoters and flanking regions for the aotJQMOP-argR operon. The −10 and −35 regions of each promoter are indicated accordingly, and the transcriptional initiation sites are indicated by arrows above the nucleotides and labeled P1 and P2, respectively. The hypersymmetric sequence resembling that of a rho-independent terminator is defined by converging arrows. The ArgR binding site as determined in this study is double underlined.