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. 2011 Oct 17;120(2):296–302. doi: 10.1289/ehp.1103927

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Frequency of sequence features associated with RPMM class CpG loci: percentage of CpG loci found in LINE-1 (A), LINE-2 (B), Alu (C), and MIR (D), within a CGI (E), or having the associated gene considered a PcG protein target gene (F). The colored dots indicate the degree of average class methylation.