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Figure S6. Representative flow cytometric analyses and gates of peritoneal cavity B lineage cells from homozygous ΔD-iD and WT littermates. Cells within the lymphocyte gate in the peritoneal cavity were first distinguished on the basis of CD19⁺ expression, and then into B1a, B1b, and B2 subsets on the basis of surface CD5 and Mac-1 expression. The average total numbers of cells in these peritoneal cavity fractions are given in Table I.