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Comparison of the structure of euchromatin and heterochromatin. Heterochromatin is hypoacetylated and hypermethylated on histone H3K9 (H3k9me2/3 (k9), H3k27me3 (k27) and H4k20me2/3 (k20) compared to euchromatin. See text for further details. HP1: heterochromatin protein 1.
