FIG. 2.

(A). Alignment of the nitroarene and naphthalene dioxygenase gene promoters. The consensus NahR binding sequence (16) is shown below the alignment. Conserved nucleotides are shaded. The −35 and −10 sites are underlined. Identified transcription start sites are in outlined font. (B) Primer extension analysis of the nbz and ntd transcripts from JS765 and JS42 grown with succinate plus salicylate, respectively. The sequencing ladder is shown at the left, and primer extension products from strain JS765 (lane 1) and from strain JS42 (lane 2) are at the right. The transcription start site is shown in outlined font.