Figure 1. Reduced PPS-3-specific Ab responses in CD21/35−/− mice.
A, PPS-3-specific IgM, IgG, and IgG3 serum Ab levels in wild type (WT), CD21/35−/−, C3−/−, and C4−/− mice at 0, 7, and 14 d post i.p. immunization with PPS-3. B, Serum TNP-specific IgM, IgG, and IgG3 Ab levels in WT, CD21/35−/−, and CD19−/− mice post immunization with TNP52-Ficoll. A–B, Results were generated using 5–10 mice/genotype. Mean Ab levels (± SEM) were determined by ELISA. Significant differences between mean Ab levels are indicated by asterisks; *, p<0.05.