Figure 2.

Isolation of human tonsil T cell and B cell subsets examined in this study. T cell subsets and B cell subsets were isolated from tonsils as described in the materials and methods section and were used in this study. The frequencies of the populations in total tonsil CD4⁺ T or CD19⁺ B population are 15–25% for CD4⁺CD57⁺ GC-Th cells, 50–60% for CD57^-CD69⁺ T cells, 20–30% for CD57^-CD69^- T cells, 40–60% for CD19⁺CD38^-IgD⁺ naïve B cells and 30–40% for CD19⁺CD38⁺IgD^- GC-B cells.