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Histone H3 K4 trimethylation within the Keratin 8 gene in SK-BR-3 and T-47D cells. ChIP assays were performed with anti-trimethyl K4 histone H3 in SK-BR-3 cells (A) or in T-47D cells (B). The amount of precipitated DNA was quantified relative to input as described in Materials and Methods. The data are presented as the means ± SD of two independent experiments. The initiation site of TATA box is designated at +1.
