Figure 1.
Anti-GPI B cells in the spleen exhibit an activated MZ phenotype, whereas those in the LN are naive mature follicular cells. Spleen or LN cells from VH147 tg or tg neg B6.K mice were stained with anti-B220, GPI-his, and antibodies against phenotypic markers or activation markers and analyzed by flow cytometry. (A) The percentages of GPI-binding B cells out of total B220+ cells in the spleen are given for the boxed regions. The GPI+ gate was drawn based on the HELμMT, which contains a monoclonal population of non-GPI-binding B cells. (B) Histograms show surface marker expression for splenic or LN B220+GPI+ cells from VH147 tg mice (open histograms) overlaid tg neg B cells (shaded histograms). (C) Histograms show activation marker expression for B220+GPI+ MZ (CD21/35high), FO (CD21/35int), or LN VH147 tg (open histograms) overlaid unfractionated tg neg B cells (shaded histograms). (D) Histograms are gated on B220+CD21/35high MZ B cells from the VH147 tg GPI+ (open histograms) overlaid GPI− (shaded histograms) populations. n = 5 mice of each genotype.