FIG. 2.

Whole-genome transcription profiles of Helicobacter pylori 26695 CAT Control and an isogenic HK0164 null mutant. Identical DNA arrays were probed with ³³P-labeled cDNA from H. pylori 26695 CAT Control (A) and H. pylori 26695/HK0164⁻ (B). Enlargements of the indicated regions of the arrays illustrate the differential levels of transcription of two of the genes identified as members of the HK0164/RR0166 regulon. 1 and 1′, HP0681; 2 and 2′, HP0682. These genes were differentially transcribed in these two H. pylori strains in three independent DNA array experiments. The results shown in this figure are typical of three separate experiments.