Figure 3

Enhancement of OVA-specific IgG _2a production. C57BL/6 mice (4/group) were injected s.c. on day 0 and day 14 with 500 μg OVA formulated in IFA. CPG (100 μg s.c.) or poly I:C (50 μg s.c.) were delivered at the time of priming and booster injections to serve as positive controls. Mice were provided PPC (20, 200, or 2000 μg/mL) ad libitum in their drinking water beginning on day -1 and lasting until day 21 when the OVA-specific IgG_2a ELISA assays were performed. Error bars represent the standard deviation. The (*) represents a p < 0.05, the (**) represents a p < 0.01, and (***) represents a p < 0.001.