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Change in cag PAI gene expression (log 10 change mRNA) between wild type H. pylori J166 and isogenic deletions of DNA upstream of the translational start codon in cag1 (416 bp, top left), cag10 (498 bp, top right), cag11 (498 bp, middle left), cag16 (532 bp, middle right), cag21 (615 bp, bottom left), and cag25 (706 bp, bottom right). Filled arrows indicate direction of transcription and open arrows indicate putative operons.
