Figure 1From: Substitution rate variation at human CpG sites correlates with non-CpG divergence, methylation level and GC contentCovariation between the observed versus expected CpG content (CpG [o/e] ) and methylation level for intronic regions of the human genome. The three panels show the covariation for datasets A, B and C, respectively (see text). Each grey dot represents one intronic region. The black dashed line is the linear regression line of a simple linear regression model.Back to article page