a,b, IF images (a) and quantification (b) of MCF10A WT and A3B KO cells stained with S9.6 (green) and DAPI (blue) (representative images; 5 μm scale; n = 3 independent experiments with >100 nuclei per condition; red bars represent mean ± s.e.m.; P value by Mann–Whitney test). c,d, S9.6 dot-blot analysis of MCF10A WT and A3B KO genomic DNA dilution series ± exogenous RNase H (RNH; representative images); parallel dsDNA dot blots provided a loading control (c). Quantification normalized to the most concentrated WT signal (representative experiment shown from four independent experiments; mean ± s.e.m.; P value by two-tailed unpaired t-test) (d). e,f, IF images (e) and quantification (f) of U2OS shCtrl and shA3B cells stained with S9.6 (green) and DAPI (blue; representative images; 5 μm scale; n = 3 independent experiments with >100 nuclei per condition; red bars represent mean ± s.e.m.; P value by Mann–Whitney test). g,h, S9.6 dot-blot analysis of a U2OS shCtrl and shA3B genomic DNA dilution series ± exogenous RNase H (RNH; representative images); parallel dsDNA dot blots provided a loading control (g). Quantification normalized to the most concentrated shCtrl signal (representative experiment shown from three independent experiments; mean ± s.e.m.; P value by two-tailed unpaired t-test) (h). i,j, IF images (i) and quantification (j) of MCF10A WT and A3B KO cells stained with S9.6 (green), DAPI (blue) and γ-H2AX (representative images; 5 μm scale; n = 3 independent experiments with >100 nuclei per condition; red bars represent mean ± s.e.m.; P value by Mann–Whitney test (left); P value by two-tailed unpaired t-test (right). k,l, IF images (k) and quantification (l) of U2OS shCtrl and shA3B cells stained with S9.6 (green), DAPI (blue) and γ-H2AX (representative images; 5 μm scale; n = 3 independent experiments with >100 nuclei per condition; red bars represent mean ± s.e.m.; P value by Mann–Whitney test (left); P value by two-tailed unpaired t-test (right).
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