Figure 3: ChIP qPCR array analysis of H4 acetylation status of promoter regions of genes on the array with HDACi exposure. CLL#4, CLL#7 specimens were treated HDACi MS275 and the enrichment index of the treated sample was divided by the enrichment index of the non-treated sample. Gene promoters who are hypo-acetylated with HDACi exposure are plotted towards the left of midline (negative numbers) and the gene promoters who increase histone acetylation are plotted towards the right of the midline (positive numbers).