Bisulfite sequencing analysis of the IGF2 DMR1 in porcine liver, muscle and kidney tissues. Filled circles are methylated and open circles are unmethylated cytosins at CpG sites. The clones are a random selection from all individuals and different tissues. DMR1 is hypermethylated but hypomethylated clones in foetal liver were also detected. The parental origin of the clones is unknown due to the lack of an informative SNP.