The distribution of HMV levels in proximal promoter regions. The dots and bars give the average and standard deviation of HMV levels in each nucleosome, respectively. Data for CD4SE genes are shown in red, and data for HK genes are shown in black. The x-axis shows the index of the nucleosomes. The nucleosomes upstream of the TSS are assigned as minus (-) and the nucleosomes downstream of the TSS are assigned as plus (+). A) H3K79me3 and B) H3K4me3 are the most predictive HMV types selected for nonCpG-related genes from Set I and Set II, respectively (see Additional file 3).