(E) Quantification of colocalization using the Pearson`s correlation coefficient (PCC) of the pC4-construct (GFP) and the cis-Golgi marker GM130 (0 min: ctrl n=63, #1 n=56, #2 n=64; 10 min: ctrl n=104, #1 n=126, #2 n=110). Shown are means ± SEM. Colocalization is significantly reduced by BET1 knockdown (siRNA #1 and #2) compared to control transfected cells. Significant differences of PCC (pC4:GM130) after 10 min induction with solubilizer were analyzed with a one-way-ANOVA followed by Dunnett`s post-hoc test. ***=p≤0.001. 0 min: ctrl 0.265±0.016, #1 0.268±0.017, #2 0.264±0.018; 10 min: ctrl 0.798±0.009, #1 0.726±0.011, #2 0.715±0.011. 