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Maps of CpG methylation (white squares, unmethylated; black squares, methylated) composed of 20 individual clones (horizontal lines) were generated from Bos taurus, mummified Bos taurus and ancient Bison priscus targeting the single-copy imprinted genes PEG3 (GenBank AY427787) and NESP55 (GenBank U77614). Clone sequences are shown in Fig. S2, S3, S4.
