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A: Averaged histone H3K4 trimethylation mark around promoters of TPGs for K562 and GM128 cell lines (log2 values of signal, normalized to max. value). B: Normalized Pol2 peak frequency for 5′ and 3′ TPGs in cell lines of hematopoietic (red bars) and non-hematopoietic (grey bars) origin. ***, ns: P<0.001, non-significant; Wilcoxon signed rank test.
