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Immunoblotting of human granulocyte extracts with various methylated histone antibodies. Samples: F, normal female; M, normal male; H, HeLa. Panels: a, dimethyl H3K9; b, trimethyl H3K9; c, monomethyl H3K27; d, dimethyl H3K27; e, trimethyl H3K27; f, dimethyl H4K20; g, trimethyl H4K20.
