Functional categories of differentially expressed genes in the adherent fraction of TIGR4 and G54. A. Percentage distribution of the up-regulated genes, B. Percentage distribution of the down-regulated genes. TIGR4 genes are depicted as black bars and G54 genes as grey bars. The percentage of genes up- or down-regulated is based on the total number of genes in the genome assigned to a particular category. The numbers on the right show the fractions from where these percentages were derived.