The distribution of 5hmC peaks in five liver genes. (a) A detailed view of the GSTK1 gene. For each 5hmC-enriched sample (y-axis), the read depth is plotted against the genomic coordinates in the given interval (x-axis). The 5hmC peaks called by the MACS software are shown by the short horizontal lines. The 5hmC blocks identified in this study are denoted by vertical rectangles. (b) Representative illustration of the genomic positions of 5hmC peaks identified in the genes ARNT, ABCC4, FMO5 and ABCC13. The fetal peaks are shown in gray and the adult peaks are shown in black.