Figure 1

IgG1 and IgG2a levels in mice after peptides immunization. Mice were immunized with PBS or respective peptides. The specific IgG1 and IgG2a antibodies in mouse serum and sIgA in bronchoalveolar lavage fluid were detected by ELISA. (A) The specific IgG1, IgG2a antibodies in the immunized mice serum. (B) The IgG2a/IgG1 ratio. (C) The sIgA level in bronchoalveolar lavage fluid. Data are shown as mean ± SD. One-way ANOVA was used for analysis. **P < 0.01, *P < 0.05.