Correlations between BAFF and BAFF-binding receptors in germinal centers of human tonsils. (A) Positive correlation between BAFF and BAFF-R expression levels in the DZ of germinal centers. (B) Positive correlation between BAFF and BAFF-R expression levels in the MZ of germinal centers. (C) Positive correlation between BAFF and TACI expression levels in the DZ of germinal centers. (D) Positive correlation between BAFF and BCMA expression levels in the DZ of germinal centers. (E) Positive correlation between BAFF and BCMA expression level at LZ in germinal centers. (F) Positive correlation between BAFF and BCMA expression level at IZ in germinal centers from human tonsils. Statistical analysis was performed using Pearson's r correlation. DZ, dark zone; IZ, interfollicular zone; LZ, light zone; MZ, mantle zone; TACI, transmembrane activator and cyclophilin ligand interactor; BCMA, B-cell maturation antigen; BAFF-R, B-cell activating factor receptor.