Comparison of CpG methylation in repetitive elements. (A) Representative FACS profiles for human and murine hematopoietic subpopulations. (B) Methylation levels of CpG dinucleotides in each repetitive element as indicated. Shown are the mean percentage of methylated CpGs for 3 independent locus (denoted as CpG 1, 2, and 3) in each region as determined by pyrosequencing analysis (n = 3).