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(A) Levels of CG methylation and non-CG methylation in intragenic and intergenic regions. Intragenic regions are further divided into 5′UTRs, exons, introns, and 3′UTRs according to the RefSeq annotations. (B) Levels of CG methylation and non-CG methylation in different types of repetitive elements. Annotation for repetitive elements was obtained from the UCSC Genome Browser.
