Figure 2Cells isolated from the bone marrow (BM) of 18-25 weeks old Bbs4+/+ (WT), Bbs4GT/GT, and Bbs4KO/KO mice were analyzed by flow cytometry. Number of analyzed mice (n) is indicated. Six (Bbs4GT/GT strain and Bbs4WT/WT controls) or eight (Bbs4KO/KO strain and Bbs4WT/WT controls) independent experiments were performed. (A) Percentage of B220low positive cells in the bone marrow . Up: Bbs4+/+ n=9, Bbs4GT/GT n=10. Down: Bbs4+/+ (n =11), Bbs4KO/KO (n=10). Statistical significance was calculated using two-tailed Mann-Whitney test. Medians are shown. Cells isolated from the bone marrow (BM) of 18-25 weeks old Bbs4+/+ (WT), Bbs4GT/GT, and Bbs4KO/KO mice were analyzed by flow cytometry. Number of analyzed mice (n) is indicated. Six (Bbs4GT/GT strain and Bbs4WT/WT controls) or eight (Bbs4KO/KO strain and Bbs4WT/WT controls) independent experiments were performed. (B) Percentage of B-cell precursors (IgM- IgD-) in the bone marrow. Gated on viable B220+ cells. Up: Bbs4+/+ (n=9), Bbs4GT/GT (n=10). Down: Bbs4+/+ (n =11), Bbs4KO/KO (n=10). Statistical significance was calculated using two-tailed Mann-Whitney test. Medians are shown. Cells isolated from the bone marrow (BM) of 18-25 weeks old Bbs4+/+ (WT), Bbs4GT/GT, and Bbs4KO/KO mice were analyzed by flow cytometry. Number of analyzed mice (n) is indicated. Six (Bbs4GT/GT strain and Bbs4WT/WT controls) or eight (Bbs4KO/KO strain and Bbs4WT/WT controls) independent experiments were performed. (C) Percentage of pre-B cells (CD43- CD24high) in the bone marrow of Bbs4+/+ (n=11) and Bbs4KO/KO mice (n=10). Gated on viable B220+ IgM- IgD- cells. Statistical significance was calculated using two-tailed Mann-Whitney test. Medians are shown. Cells isolated from the spleens (SPL) of 18-25 weeks old Bbs4+/+ (WT), Bbs4GT/GT, and Bbs4KO/KO mice were analyzed by flow cytometry. Number of analyzed mice (n) is indicated. Six (Bbs4GT/GT strain and Bbs4WT/WT controls) or eight (Bbs4KO/KO strain and Bbs4WT/WT controls) independent experiments were performed. (D) Percentage of late mature (IgM- IgD+) B cells in the spleen of Bbs4+/+ (n=11) and Bbs4KO/KO mice (n=10) Gated on viable CD19+ cells. Statistical significance was calculated using two-tailed Mann-Whitney test. Medians are shown. Cells isolated from the spleens (SPL) of 18-25 weeks old Bbs4+/+ (WT), Bbs4GT/GT, and Bbs4KO/KO mice were analyzed by flow cytometry. Number of analyzed mice (n) is indicated. Six (Bbs4GT/GT strain and Bbs4WT/WT controls) or eight (Bbs4KO/KO strain and Bbs4WT/WT controls) independent experiments were performed. (E) An alternative analysis of the experiment shown in (D). Geometric mean fluorescence intensity (MFI) of BV421 (IgM) on IgD+ B cells was determined. Mean of MFI values for each genotype per experiment was quantified, and obtained values were normalized to Bbs4+/+ (=1) for each experiment. Two-tailed One Sample Wilcoxon Signed Rank Test was used for the statistical analysis. Cells isolated from the spleens (SPL) of 18-25 weeks old Bbs4+/+ (WT), Bbs4GT/GT, and Bbs4KO/KO mice were analyzed by flow cytometry. Number of analyzed mice (n) is indicated. Six (Bbs4GT/GT strain and Bbs4WT/WT controls) or eight (Bbs4KO/KO strain and Bbs4WT/WT controls) independent experiments were performed. (F) Percentage of splenic marginal zone (MZ) B cells (CD23- CD1d+) in Bbs4+/+ controls (n=10) and Bbs4KO/KO mice (n=9) was determined. Gated on viable CD19+, IgD- IgM+, CD138- cells. Statistical significance was calculated using two-tailed Mann-Whitney test. Medians are shown.