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Line graphs showing the change in expression level [log2 (R/G)] of selected genes over time (in hours). (A) The heat shock operons: DnaK (dnaK, grpE, and hrcA) and HspR (cbpA, hspR, and orf [HP1026]). (B) An operon containing H. pylori-specific genes of unknown function. The legend on the right in each case indicates the names of the genes plotted.
