Figure 3.
Landscape of DNA methylation across the whole genome.
(A) Heatmap of 26,816 mouse genes organized in gene sets identified by k-means clustering in CpG, CHG, and CHH contexts at the indicated phases. The dataset of methylation levels was calculated with the SeqMonk software with RRBS pipeline. The raw methylation levels were processed with log transform. The ComplexHeatmap R package (k-mean = 5) was used to generate the heatmap. Legends for CpG, CHG and CHH methylation levels are on the bottom of the heatmaps. (B) Overview of CpG, CHG and CHH methylation at genic regions, including the promoter, 5′UTR, exon, intron and 3′UTR. The genomic annotation was downloaded from the USCS genome browser and then imported into the SeqMonk software. The quantitation trend plot function was applied to compare the methylation levels within the genomic elements. mCG: Methylated CG dinucleotide; mCHG: methylated CHG trinucleotide; mCHH: methylated CHH trinucleotide; PC: principal component; UTR: untranslated region.