(G) Effect of KLF4 PARylation on NHEJ and HR. Wild-type or KLF4-Zinc 2-YYR/AAA mutant KLF4 were co-transfected with I-SCE construction in U2Os-GFP-EJ5 cells (for NHEJ assay) or U2Os-DR-GFP (for HR assay). n=3, p values were labeled in figure, one-way ANOVA assay. 