Figure 1From: Construction and immunogenicity of a DNA vaccine coexpressing GP3 and GP5 of genotype-I porcine reproductive and respiratory syndrome virusEuropean type PRRSV GP5/GP3 prokaryotic protein expression and purification. (A) Protein expressed from pGEX-4Â T-ORF5: M, molecular weight markers; lane 1 and 2, GP5 protein after IPTG induction; lane 3 and 4, empty vector control before IPTG induction; lane 5 and 6, purified protein. (B) Protein expressed from pET-28a-ORF3: M, molecular weight markers; lane 1 and 2, GP3 protein after IPTG induction; lane 3 and 4, purified protein.Back to article page