Differential gene expression profiles of AGS gastric epithelial cells infected with WT, rocF- and the rocF+complemented H. pylori strains. A. Representative portion of the Log10 ratio between the net expression values between the infected and the non-infected cells, as described in Materials and Methods. The analysis was done using four replicates of each treatment. The marked areas above the heat map show genes associated with different cellular functions. B. Venn diagram showing the number of genes affected (up- and down-regulated) by the infection of AGS cells with the WT, rocF-, or rocF + strains of H. pylori. The green number (262) indicates the number of genes that are common to all treatments; the black numbers indicate unique genes in each treatment; the total shaded area represent 583 genes that are neither common nor unique (similar genes).