Higher H3K9ac on inducible genes is independent of the presence of CpG islands. (a) The percentage of genes with CpG islands is plotted for genes grouped by their kinetics of expression (red, primary response genes; blue, secondary response genes; white, unchanged genes) and basal expression levels (Log2 robust multichip average values from the expression microarrays). (b, c) H3K9ac MAT scores were plotted for the different gene groups subdivided into genes with (b) or without (c) CpG islands. The bar marks the median score, the edges of the boxes the second and third interquartile ranges and the whiskers the first and fourth interquartile ranges. (d, e) The percentage of promoters with a H3K9ac MAT score >35.2 (FDR <5%) was plotted for the different groups subdivided into genes with (d) or without (e) CpG islands.