FIG. 1.
Primer extension analysis of three qsc transcripts. (Top) Polyacrylamide gels of qsc102 (A), qsc117 (B), and phzA (C). Sequencing ladders are shown on the left, and primer extension products from P. aeruginosa PAO1 RNA are on the right. (Bottom) DNA sequences of the promoter regions. Transcription start sites are in boldface, putative −10 regions are underlined, and lux-box-like elements are boxed.