Figure 1.
Bcl-6+ PD-1lo CD4+ cells are seen at the T–B border after SRBC immunization. (A–C) Immunofluorescence stains of spleen sections from C57BL/6 mice at 0 (A), 3 (B), and 7 d (C) after SRBC immunization. Boxed areas indicate the location of the zoomed-in images on the right, in the same order (from top to bottom). These data are representative of two independent experiments with four mice per experiment. F, follicle; T, T zone.