Figure 2From: Co-expression of Ubiquitin gene and capsid protein gene enhances the potency of DNA immunization of PCV2 in miceKinetics of total IgG production against PCV2 Cap protein at various times p.i. The results are shown as means ± SD (n = 5). Significant differences between the vaccines are indicated: **, P < 0.01; *, P < 0.05.Back to article page