Fig. 2.

Tethering of Gal4-HP1 results in global downregulation of integrated reporters. a–c Reporter expression compared between TRIP pool transfected with Gal4-HP1 or controls Gal4 or HP1 only as quantified by NGS 2 days after transfection. d–f Quantification of reporters showing expression detectable by at least one sequencing read. g Correlation (Spearman) between expression in the Gal4-transfected control condition and downregulation upon HP1 tethering with linear regression (red) and standard error. Downregulation is quantified by ratio of expression in the Gal4-HP1-transfected condition over expression in the Gal4-transfected control condition; therefore, only reporters with detectable expression in both conditions are shown. h GFP reporter expression in a cell line with single integration induced with increasing levels of CuSO₄ and transfected with Gal4-HP1 or Gal4 as quantified by qPCR. Amount of repression upon Gal4-HP1 tethering is constant over expression range. Data information: In (a–c), a pseudocount of 0.1 was added to all expression values in order to be able to visualize non-expressed reporters on a log scale