Fig. 2From: Genetic and environmental determinants of O6-methylguanine DNA-methyltransferase (MGMT) gene methylation: a 10-year longitudinal study of Danish twinsHistogram (a), scatter plot for MZ twins (b) and DZ twins (c) of the beta value for the 4 CpG-SNPs which are significant in both waves. The scatter plots are symmetric by the twin1 = twin2 line, as each twin pair of the same wave was plotted twiceBack to article page