A. HAP1 NAA80 KO cells were transfected with either EGFP-control vector, NAA80-EGFP or catalytically dead NAA80mut-EGFP, fixed 24 h post transfection and IF stained for GM130. Representative confocal STED images from three independent experiments are shown; scale bar = 20 μm. B. Quantification of Golgi fragmentation in the transfected NAA80 KO cells shown in A. The mean ± sd of three independent experiments (each with n ≥ 200 cells) is shown; *p ≤ 0.05, one-way ANOVA with Tukey’s multiple comparison test. C. Western blot analysis of EGFP, actin Nt-acetylation (Ac-β-actin), pan actin and NAA80 in whole cell lysates of transfected NAA80 KO cells. Cells were transfected as in A and harvested 24 h post transfection. Representative blots from two independent experiments are shown.