EMBO/SourceData huggingface dataset:
Figure 2(A) Representative images of wild-type (WT) and mutant (KO) neurospheres obtained from E15.5 neocortices and cultured in vitro. The culture passage ("step") corresponds to 3 days of culture after dissociation and re-plating. KO aggregates are more numerous and larger in size. Data information: Scale bars: 50µm.(B) Graph showing the number of neurospheres per P100 cell plate at different steps, as indicated. Nr2f1KO neurospheres proliferate for a longer time (up to 30 passages tested), whereas WT cells exhaust around step 9. n ≥ 3 culture wells from n = 2 batches. Data information: data are represented as means ± SEM. 2-way ANOVA (B) (**P<0.01, ***P<0.001).(C) Panel of WT and KO isolated neurospheres grown from day 1 to day 10. Blue and red lines represent the diameter of WT and KO neurospheres, respectively. Data information Scale bars: 50µm.(D,E) PH3 (green; dividing cells) IF on cross-sections of day 4 neurospheres. White arrowheads point at mitotic figures, which are quantified in (E) as percentage of dividing cells over DAPI-stained nuclei (blue). n ≥ 3 neurospheres from n = 2 batches. Data information: data are represented as means ± SEM. Student t-test (E) (**P<0.01, ***P<0.001). Scale bars: 50µm.
Figure 3(A-D) Ki67 (green; mitotically active progenitors) and Tuj1 (red; post-mitotic neurons) IF at E14.5 (A,A'), E16.5 (B,B') and E18.5 (C,C') of lateral pallia of wild-type (WT) versus mutant (KO) brains. Ki67+ proliferating cells (quantified in D) accumulate in mutant cortices. n ≥ 3 brains. Data information: Nuclei (blue) were stained with DAPI. the number of positive cells was quantified in 100µm-width boxes, randomly placed across the LP. 2-way ANOVA (*P<0.05, **P<0.01, ***P<0.001). Scale bars: 50µm. CP: cortical plate; IZ: intermediate zone; SVZ: subventricular zone; VZ: ventricular zone.(E-F') Tbr2 (green; IPs) and Pax6 (red; radial glia cells) IF of E13.5 (E,E') and E17.5 (F,F') lateral pallia of WT and KO brains. Data information: Nuclei (blue) were stained with DAPI. Scale bars: 50µm. CP: cortical plate; IZ: intermediate zone; SVZ: subventricular zone; VZ: ventricular zone.Quantification of different classes of cortical progenitors: apical radial glia cells (aRGs) as Pax6+ NPs in VZ (G), basal intermediate progenitors (IPs) as Tbr2+ cells in SVZ (H) n ≥ 3 brains. Data information: the number of positive cells was quantified in 100µm-width boxes, randomly placed across the LP. 2-way ANOVA (*P<0.05, **P<0.01, ***P<0.001).Quantification of different classes of cortical progenitors: , basal RGs as Pax6+ cells in outer SVZ (I). n ≥ 3 brains. Data information: the number of positive cells was quantified in 100µm-width boxes, randomly placed across the LP. 2-way ANOVA (*P<0.05, **P<0.01, ***P<0.001).(J-L) E12.5 dorsal brain views (J,J') and representative sections of posterior hemispheres (K,K'), showing a vesicle enlargement in mutant brains (K'). The extension of the ventricular surface was quantified along the A-P axis (L); red color code represents Nr2f1 gradient in WT brains. 12µm-thick sections were collected on series of 10 slides; consecutive measurement levels are 120µm apart from each other. n ≥ 3 brains. Data information: In graphs, data are represented as means ± SEM. 2-way ANOVA (*P<0.05, **P<0.01, ***P<0.001).(N-P) GFP (green; expressed under Sox2 promoter) and RFP (red; expressed under Tis21 promoter) IF of E13.5 lateral pallia, 18-hours after IUE. The proportion of single or double positive NPs is shown in pie charts in (P). n = 3 electroporated brains. Data information: Nuclei (blue) were stained with DAPI. 2-way ANOVA (*P<0.05, **P<0.01, ***P<0.001).(Q-R') Ki67 (green; progenitors) and EdU (red) IF of E13.5 WT (Q,Q') and KO (R,R') embryos, injected with EdU at E12.5. Differentiating cells (EdU+Ki67-) are located in the IZ/CP; percentages shown in (Q',R') were obtained from n ≥ 4 sections of n ≥ 2 brains. Data information: Nuclei (blue) were stained with DAPI. Student t-test (Q',R'; E13.5, EdU injected at E12.5; WT/KO: *=0.03967 (*P<0.05, **P<0.01, ***P<0.001). Scale bars: 50µm. CP: cortical plate; IZ: intermediate zone; SVZ: subventricular zone; VZ: ventricular zone.
Figure 4(A-D) Graphs showing the average number of PH3+ mitotic figures in the posterior lateral pallium of WT and mutant cortices. The total number of mitoses (A) as well as the number of dividing cells in VZ (Pax6+Sox2+ aRGs; B), SVZ (Tbr2+ IPs; C) and outer (basal-most) region of SVZ (oSVZ/IZ; Pax6+ oRGs; D) are shown. For graphs (B-D), statistical analysis by 2-way ANOVA n ≥ 3 brains per age/genotype. Data information: the number of positive cells was quantified in 100µm-width boxes, randomly placed across the lateral pallium. In graphs, data are represented as means ± SEM. 2-way ANOVA *P<0.05, **P<0.01, ***P<0.001). SVZ: subventricular zone; VZ: ventricular zone.(E) Cell cycle duration at different embryonic ages (from E10.5 to E16.5) in WT (blue bars) or KO embryos (orange line), as quantified upon a double EdU/BrdU injection protocol in posterior-most LP n ≥ 3 brains per age/genotype. Data information: the number of positive cells was quantified in 100µm-width boxes, randomly placed across the lateral pallium. In graphs, data are represented as means ± SEM. 2-way ANOVA *P<0.05, **P<0.01, ***P<0.001).(F-G') Ki67 (green; NPs) and EdU (red) IF in WT (F,F') and KO (G,G') after 6 hours consecutive EdU incorporation. Note the higher number of labelled NPs in KO cortices (G') suggesting faster cell cycle progression and/or longer S-phase. Data information: Nuclei (blue) were stained with DAPI.(H) Best linear fit of EdU+Ki67+ NP percentage after 8 hours EdU cumulative labelling in WT (blue line) and KO (orange line) brains. The x- and y-intercept are proportional to the S-phase length and to the number of cycling cells, respectively, while the steepness of the line is proportional to cell cycle duration. WT: y = 11.66x +24.62; KO: y = 13.54x +32.96). n ≥ 2 brains per time point/genotype. Data information: the number of positive cells was quantified in 100µm-width boxes, randomly placed across the lateral pallium. In graphs, data are represented as means ± SEM. 2-way ANOVA *P<0.05, **P<0.01, ***P<0.001).(I-K) PH3 (green; dividing NPs) and Pax6 (red; aRGs) IF of E13.5 WT (I) and KO (J) lateral pallia. Strong and weak/punctate PH3 patterns show M-phase and G2-phase cells, respectively. G2-phase NP percentage is quantified in (K). As a result of shorter G1-phase and globally shorter cell cycle time, the percentage of G2-phase cells is increased in the KO NP pool. n ≥ 2 brains. Data information: Nuclei (blue) were stained with DAPI. the number of positive cells was quantified in 100µm-width boxes, randomly placed across the lateral pallium. In graphs, data are represented as means ± SEM. Student t-test (K; *P<0.05) Scale bars: 50µm. SVZ: subventricular zone; VZ: ventricular zone.(L) Cell cycle time of E13.5 NPs in the lateral pallia of WT (upper column) and KO cells (lower column), as calculated by EdU cumulative labelling and PH3 staining KO NPs have a 16.1% faster cell cycle time, due to a 30.9% shorter G1-phase compensating a 14.3% longer S-phase. n ≥ 3 brains. In graphs, data are represented as means ± SEM. 2-way ANOVA (*P<0.05, **P<0.01, ***P<0.001).
Figure 5(A-B') Pax6 (green; aRGs) and Nr2f1 (red) IF of E12.5 WT (A,A') and KO (B,B') lateral pallia. Data information: nuclei (blue) were stained with DAPI. Scale bars: 50µm. SVZ: subventricular zone; VZ: ventricular zone.(C) Pax6 and Nr2f1 pixel intensity quantification at E12.5 and E14.5 indicating increased Pax6 levels upon Nr2f1 removal. n ≥ 3 brains. Data information: the pixel intensity was quantified in 100µm-width boxes, randomly placed across the lateral pallium. Data are represented as means ± SEM. 2-way ANOVA (*P<0.05, **P<0.01, ***P<0.001).(D) Real time RT-PCR quantification of Nr2f1 and Pax6 expression in E12.5 cortices. n ≥ 3 cortices. Data information: Data are represented as means ± SEM. 2-way ANOVA (*P<0.05, **P<0.01, ***P<0.001).(E-G'') GFP (green; electroporated cells), Pax6 (red) and Nr2f1 (blue) IF of pCIG2-Nr2f1-IRES-GFP electroporated brains at E13.5 (24-hours after IUE). VZ (F-F'') and CP (G-G'') regions are shown at high magnification. Arrowheads point to GFP+ electroporated cells over-expressing Nr2f1 (blue in F',G'), down-regulating Pax6 (F'') and rapidly migrating out of the VZ (G-G''). Scale bars: 50µm. SVZ: subventricular zone; VZ: ventricular zone.(H) Scatter plot showing Pax6 and Nr2f1 pixel intensity of VZ electroporated progenitors, comparing Nr2f1 overexpressing cells (orange dots) with control pCIG2-GFP electroporated cells (blue dots). Average Nr2f1 and Pax6 pixel intensities of the 2 populations were compared by 2-way ANOVA and resulted significantly different (***= <0.0001). n = 2 electroporated brains. Data information Data are represented as means ± SEM. 2-way ANOVA *P<0.05, **P<0.01, ***P<0.001).(I) Real time RT-PCR of cell cycle genes comparing WT (blue line) and KO (orange line) cortices. CyclinD1 and P21 transcripts are down-regulated whereas Dct is up-regulated in mutants. n = 3 cortices. Data information: Data are represented as means ± SEM. 2-way ANOVA *P<0.05, **P<0.01, ***P<0.001).(J-L) GFP (green; electroporated cells) and P21 (red) IF of E14.5 cortex electroporated 48 hours earlier with control PX458 plasmid (J) or CRISPR/Cas9-expressing plasmid directed against Nr2f1 sequence (PX458-αNr2f1; K). Percentage of P21/GFP double positive cells (L). Arrowheads in (J,K) point to P21+ cells. n = 2 electroporated brains. Data information , nuclei (blue) were stained with DAPI. Student t-test (L; *P<0.05(N) Graph showing the number of differentially expressed genes (DEG up-regulated (UP) or down-regulated (DOWN) in KO compared to WT, as detected by RNA-Seq of E15.5 neocortices. Data information: For statistical analysis of RNA-Seq data , see Methods.(P) Hierarchical clustering and heatmap of the expression level of DEGs belonging to the "neuron differentiation" Heat map color scale indicates normalized gene expression from high (red) to low (white) level. Data information: For statistical analysis of RNA-Seq data see Methods.
Figure 6(A) Real time RT-PCR analysis of Pax6 expression in neurospheres with different genotypes, as indicated. n = 3 cortices. N KO P HET: Nr2f1 KO, Pax6 HET. Data information: Data are represented as means ± SEM. 2-way ANOVA ; *P<0.05, **P<0.01, ***P<0.001).(B) Representative images of Nr2f1 KO Pax6 HET neurospheres obtained from E15.5 neocortices and cultured in vitro. Scale bars: 50µm.(C) Graph showing the number of neurospheres per P100 cell plate, at different steps, as indicated. While Nr2f1 KO neurospheres (orange line) proliferate for a longer time compared to WT ones (blue line), the loss of one Pax6 allele (gray line) almost restores normal proliferation rate and exhaustion time. Complete Pax6 loss is not compatible with stem cell renewal (yellow line). n ≥ 3 culture wells from n = 2 independent batches. Data information: Data are represented as means ± SEM. 2-way ANOVA ; *P<0.05, **P<0.01, ***P<0.001).(D-E) Paired cell analysis after neurosphere dissociation and 24-hour culture at clonal density. Couples of dividing cells were identified by Map2 (red; N, neurons) and BLBP (green; P, progenitors) IF. Pie charts in (E) show the proportion of P-P (proliferative; D), P-N (asymmetric differentiative; D') or N-N (symmetric differentiative; D'') couples in WT, Nr2f1KO and Nr2f1KO Pax6HET animals. n ≥ 3 samples from n = 2 culture batches. Data information: Nuclei (blue) were stained with DAPI. Data are represented as means ± SEM. 2-way ANOVA ; *P<0.05, **P<0.01, ***P<0.001 Scale bars: 50µm.(F-I) Pax6 (green) and Nr2f1 (red) IF in the posterior-most region of E12.5 cortex, showing Pax6 upregulation in Nr2f1 KO animals (G,G') compared to WT (F',F''). Normal Pax6 levels can be restored by loss of one Pax6 allele (Nr2f1 KO, Pax6 HET; H,H'). n ≥ 3 brains. N KO: Nr2f1 KO; P HET: Pax6 HET. Data information: Nuclei (blue) were stained with DAPI. Scale bars: 50µm.Pixel intensity quantification of Nr2f1 (blue) and Pax6 (orange) is shown in (I). n ≥ 3 brains. N KO: Nr2f1 KO; P HET: Pax6 HET. Data information: the pixel intensity or the number of positive cells was quantified in 100µm-width boxes, randomly placed across the LP. Data are represented as means ± SEM. 2-way ANOVA ; *P<0.05, **P<0.01, ***P<0.001).(J) Cell cycle duration at E12.5 in different mutants as indicated, quantified in posterior regions with double EdU/BrdU injection protocol n ≥ 6 sections from n = 2 brains. Data information: the pixel intensity or the number of positive cells was quantified in 100µm-width boxes, randomly placed across the LP. Data are represented as means ± SEM. 2-way ANOVA ; *P<0.05, **P<0.01, ***P<0.001).(K) Insets showing representative γ-Tubulin (green) and Phospho-Vimentin (red) IF of the cortical VZ surface to evaluate the orientation of the cleavage plane of dividing aRGs. Pie charts show the percentage of vertical (green), oblique (yellow) and horizontal (red) division planes of mitotic figures in the E12.5 lateral pallium of animals with different genotypes, as indicated. n ≥ 2 brains per genotype. Data information: Nuclei (blue) were stained with DAPI. Data are represented as means ± SEM. 2-way ANOVA ; *P<0.05, **P<0.01, ***P<0.001). cale bars: 50µm.
Figure 7(A-C) NR2F1 expression in cerebral organoids during neural induction and differentiation in vitro (day 40 and day 70, respectively), together with the NP markers PAX6 (green in A), SOX2 (green in B,B') and DCX as a neural marker (blue in A,B,B''). Quantification of NR2F1 levels in NPs is shown in (C). n ≥ 4 organoids from n = 2 batches. Data information: the pixel intensity or the number of positive cells were quantified in 100µm-width boxes, randomly placed across the cortex/organoid neuroepithelia In graphs, data are represented as means ± SEM. 2-way ANOVA test (*P<0.05, **P<0.01, ***P<0.001). Scale bars: 50µm.(D-G) NR2F1 (red) and PAX6 (green) IF in day 40 organoids. Neuroepithelia with high NR2F1 levels show weak PAX6 expression (E,E'), and vice versa (F,F'). Quantification by pixel intensity analysis (G). n ≥ 4 organoids from n = 2 batches. Data information: Nuclei (blue stained with DAPI. the pixel intensity or the number of positive cells were quantified in 100µm-width boxes, randomly placed across the cortex/organoid neuroepithelia In graphs, data are represented as means ± SEM. 2-way ANOVA test (*P<0.05, **P<0.01, ***P<0.001). Scale bars: 50µm.(I-J) NR2F1 (red) and GFP (green) IF in day 40 human brain organoids upon electroporation of the PX458-αNR2F1 plasmid. In (I,I'), GFP+NR2F1- cells (empty arrowheads) and a GFP+NR2F1+ cell (white arrowhead) are shown; quantification in (J). n ≥ 6 organoids from n = 2 batches. Data information: Nuclei (blue stained with DAPI. the pixel intensity or the number of positive cells were quantified in 100µm-width boxes, randomly placed across the cortex/organoid neuroepithelia In graphs, data are represented as means ± SEM. 2-way ANOVA test (*P<0.05, **P<0.01, ***P<0.001). Scale bars: 50µm.(K-M) TUJ1 (red; differentiating neurons) and GFP (green) IF 7 days after electroporation of control (K) and PX458-αNr2f1 plasmids (L). Co-expression of GFP with SOX2 or TUJ1 distinguishes neural progenitors (NPs) from neurons (Ns), as quantified in (M). Arrowheads in (K,L) point to TUJ1+ GFP+ cells. n ≥ 6 organoids from n = 2 batches. Data information: Nuclei (blue stained with DAPI. the number of positive cells was normalized over the total number of GFP+ cells. In graphs, data are represented as means ± SEM. 2-way ANOVA test (*P<0.05, **P<0.01, ***P<0.001). Scale bars: 50µm.(N) Red and green arrowheads in (N) point to a SOX2+ (red) progenitor and a TUJ1+ (blue) neuron, respectively. Scale bars: 50µm.
Figure 1 (C, D) Standard replication assays on undamaged (UD), thymine glycol (Tg), and cyclobutane pyrimidine dimer (CPD) templates in the presence (C) and absence (D) of Pol η, Pol ζ, Rev1, Rad6-Rad18, Uba1, and ubiquitin (TLS machinery). Reactions contained 2.5 nM Pol δ.
Figure 2 (B) Oligonucleotide competition assay on UD and Tg templates. S; scrambled oligonucleotide. (C) Lane profiles of lanes 4-6 in (B) normalised to the run off product. FL; FL-lead, OR; oligonucleotide restart, S; Stall, RO; Run off, OF; Okazaki fragments.  (D) Pulse chase reaction on UD and Tg templates performed as shown. Where present, Pol δcat (10 nM) was added directly after addition of the chase. (E) Standard replication reaction performed in the absence and presence of RFC/PCNA on the Tg template.
Figure 3 (B) Pulse chase reactions on the Tg template in the absence and presence of 10 nM Pol δ analysed on a denaturing gel.  (D) Pulse chase reaction on the Tg template in the absence and presence of 10 nM Pol δ analysed on a urea polyacrylamide gel.  (E) Titration of Pol δ in a pulse chase reaction on the Tg template. Pol δ was added after the 0 min time point was taken. (F) Quantification of bypass 5 min after addition of the chase for the data in (E).  (G) Titration of Pol δ or Pol ε (1, 2.5, 5, 7.5, 10 nM)­­ into a primer extension assay on a Tg template in the presence of PCNA and RFC. The primer/template sequence and location of the lesion are shown above.
Figure 4 (B) Mapping the 3ʹ-end of the stalled nascent leading strand. Pulse chase reaction on Tg and CPD templates. Where present, Pol δ (10 nM) was added immediately after the 0 min time point. Products were cleaved with SwaI and BamHI and resolved alongside a sequencing ladder corresponding to the nascent strand. dd; dideoxy.
Figure 5 (A) Primer extension reactions on the Tg template with 5 nM Pol δ or Pol ε and either dATP, dCTP, dGTP, or dTTP.  (C) Analysis of nucleotide incorporation opposite Tg from replication reactions processed as shown in (B). Three individual experiments were performed, two in the presence and one in the absence of Pol δ (10 nM), giving 99, 97, and 95 successful sequencing reads respectively.
Figure 6(A) Standard replication assay on undamaged (UD), 8-oxoguanine (8oxoG), and thymine glycol (Tg) templates in the absence of TLS components. (B) Pulse chase reaction on UD and 8oxoG templates. Where present, Pol δcat (10 nM) was added directly after addition of the chase.  (C) Pulse chase reactions on the 8oxoG template in the absence and presence of 10 nM Pol δ analysed on a denaturing gel.
Figure 2.A) Assessment of the detection limit of synthetic SARS-CoV-2 by the CRISPR-based assay, inferred from fluorescence values after 30 min. Background subtracted fluorescence represents sample minus control fluorescence without target.Detection of synthetic SARS-CoV-2 RNA using commercially available paper strips (lateral-flow) in buffer (B)Detection of synthetic SARS-CoV-2 RNA using commercially available paper strips (lateral-flow) in saliva (C).
Figure 1Rag1-/-:Bcl2 and Art-/-:Bcl2 abl pre-B cells were treated with imatinib for 48 h to induce G1 arrest. (A) DSBs quantified by qPCR analysis of Igk (Jκ1) genomic DNA. Schematic shows germline (GL) Igk locus, unrepaired Jκ1 coding end (Cut) and primer location. Results are normalized to Rag1-/-:Bcl2 abl pre-B cells, which do not generate RAG DSBs and have only germline Igk DNA. Loss of Igk germline product is representative of DSB generation.Rag1-/-:Bcl2 and Art-/-:Bcl2 abl pre-B cells were treated with imatinib for 48 h to induce G1 arrest. (B) Representative images of 53BP1 foci. Scale bar denotes 8 μm. Bar graph shows percentage of cells with indicated number of foci from three biological replicates. In each replicate, 100 cells per condition were quantified.Rag1-/-:Bcl2 and Art-/-:Bcl2 abl pre-B cells were treated with imatinib for 48 h to induce G1 arrest. (C) Western blot analysis of KAP1 phosphorylation (p-KAP1), NF-κB2 (p100 and p52) and PIM2. GAPDH is shown as loading control.Rag1-/-:Bcl2 and Art-/-:Bcl2 abl pre-B cells were treated with imatinib for 48 h to induce G1 arrest. (D) Cd40 and Pim2 mRNA expression.Rag1-/-:Lig4-/-:Bcl2 abl pre-B cells were transduced with an empty vector (control) or vector expressing RAG1 then treated with imatinib for 48 h. (E) DSBs quantified by qPCR analysis of Igh (JH1) genomic DNA and analyzed as in A with results normalized to empty vector control, which has only germline Igh DNA.Rag1-/-:Lig4-/-:Bcl2 abl pre-B cells were transduced with an empty vector (control) or vector expressing RAG1 then treated with imatinib for 48 h. (F) Representative images of 53BP1 foci. Scale bar denotes 8 μm. Bar graph shows percentage of cells with indicated number of foci from three biological replicates. In each replicate, 100 cells per condition were quantified.E-H. Rag1-/-:Lig4-/-:Bcl2 abl pre-B cells were transduced with an empty vector (control) or vector expressing RAG1 then treated with imatinib for 48 h. (G) Western blot analysis of FLAG-RAG1, p-KAP1, NF-κB2, and PIM2. GAPDH is shown as loading control.Rag1-/-:Lig4-/-:Bcl2 abl pre-B cells were transduced with an empty vector (control) or vector expressing RAG1 then treated with imatinib for 48 h. (H) Cd40 and Pim2 mRNA expression.
Figure 2A. Rag1-/-:Lig4-/-:Bcl2:iCas9 abl pre-B cells were treated with (+) or without (-) 2 μM doxycycline (Dox) to induce Cas9 as indicated. Western blot shows FLAG-Cas9 and GAPDH (loading control).Rag1-/-:Lig4-/-:Bcl2:iCas9 abl pre-B cells were treated with doxycycline as in A and imatinib to trigger cell cycle arrest for 24 h. Cells were then transfected with indicated gRNA and maintained in doxycycline and imatinib. All analyses were completed 48 h after gRNA transfection. DSBs quantified by qPCR analysis of Eb (B) and Gapdh (C) genomic DNA. Results are normalized to cells without gRNA (-). Schematic shows germline (GL) locus, unrepaired cut end (Cut) and location of gRNA and primers. Loss of germline product is representative of DSB generation.(D) Representative images of 53BP1 foci. Scale bar denotes 8 μm. Bar graph shows percentage of cells with indicated number of foci from three biological replicates. In each replicate, 100 cells per condition were quantified.(E) Western blot analysis of FLAG-tagged Cas9 or RAG1 (as indicated), p-KAP1, NF-κB2, and PIM2. GAPDH is shown as loading control. Responses to RAG DSBs in Rag1-/-:Lig4-/-:Bcl2 abl pre-B cells transduced with empty vector or vector expressing RAG1 RAG DSBs from Fig 1G are included for direct comparison. # denotes band for FLAG-Cas9. * denotes band for FLAG-RAG1.(F) Cd40 and Pim2 mRNA expression. Blue dashed line indicates mRNA expression in response to RAG DSBs from Fig 1H and is included for comparison.
Figure 3A-B. DSBs quantified by qPCR analysis of Jκ1 (A) and JH1 and JHD1-1 (B) genomic DNA. Schematics show germline (GL) locus and location of respective gRNAs and primers. PCR is normalized to cells without gRNA (-). Loss of germline product is representative of DSB generation.C. Representative images of 53BP1 foci. Scale bar denotes 8 μm. Bar graph shows percentage of cells with indicated number of foci from three biological replicates. In each replicate, 100 cells per condition were quantified.D. Western blot analysis of FLAG-Cas9, p-KAP1, NF-κB2, and PIM2. GAPDH is shown as loading control.E. CD40 and Pim2 mRNA expression. Blue dashed line indicates mRNA expression in response to RAG DSBs from Fig 1H and is included for comparison.
Figure 4B. DSBs quantified by qPCR analysis of Igh (JH1) genomic DNA and analyzed as in Fig 1E with results normalized to empty vector control, which has only germline Igh DNA. There is no statistically significant difference in DSBs generated by cRAG1 or RAG1P326G compared to full-length RAG1.C. Representative images of 53BP1 foci. Scale bar denotes 8 μm. Bar graph shows percentage of cells with indicated number of foci from three biological replicates. In each replicate, 100 cells per condition were quantified.D. Western blot analysis of FLAG-RAG1, p-KAP1, NF-κB2, and PIM2. GAPDH is shown as loading control.E. Cd40 and Pim2 mRNA expression.