FIG 1 .

The mtr locus in N. gonorrhoeae. (A) Organization of the mtr locus. Bent arrows mark the mtrR and mtrCDE promoters (P). mtrR and mtrCDE are divergently transcribed on opposite strands. The locations of the mtr₁₂₀ mutation and the mtrC-lacZ fusion start sites are indicated. The hatched box represents the location of the expanded sequence. (B) Sequence of the mtrR-mtrCDE intergenic region. The previously characterized mtrR and mtrCDE promoter elements, the consensus −10 sequence generated by the mtr₁₂₀ mutation, and the putative −35 element for the mtr₁₂₀ promoter are indicated in the expanded sequence. The transcription start site from the previously characterized mtrCDE promoter is marked by a single cross; the transcription start point from the mtr₁₂₀ promoter is marked by a double cross.