Methylation pattern obtained by qBGS. Methylation pattern observed using qBGS. The black and white circles indicate methylated and unmethylated CpG sites, respectively. Horizontally, 77 CpG sites are aligned. Vertically, the sequencing results of individual clones are aligned. (A) Sample 29 from cluster 1 of Figure 1; (B) sample 46 from cluster 2; (C) sample 10 from cluster 3; and (D) sample 31 from cluster 4.