Figure 1.

The mutation rates for all CpG sites, methylated CpG sites and unmethylated CpG sites. The methylated CpG sites are further categorized into five groups according to their methylation levels. The X-axis includes CpG sites with different methylation levels (Total_CpG: total CpG; mCpG: methylated CpG; H_mCpG: highly methylated CpG (> 80%); HI_mCpG: high-intermediately methylated CpG (60-80%); I_mCpG: intermediately methylated CpG (40-60%); LI_mCpG: low-intermediately methylated CpG (20-40%); L_mCpG: lowly methylated CpG (≤ 20%); unCpG: unmethlated CpG). The Y-axis is the mutation rate that was calculated as the SNP density at CpG sites.

Xia et al. BMC Genomics 2012 13(Suppl 8):S7   doi:10.1186/1471-2164-13-S8-S7