Fig. 2From: A candidate DNA vaccine encoding a fusion protein of porcine complement C3d-P28 and ORF2 of porcine circovirus type 2 induces cross-protective immunity against PCV2b and PCV2d in pigsIn vitro expression of DNA vaccine constructs. DNA vaccine constructs were transfected into PK-15 cells and then stained with rabbit polyclonal anti-Cap of PCV2 followed by FITC-labelled goat anti-rabbit antibody. a negative control; (b) pVAX1-ORF2; (c) pVAX1-ORF2-C3d-P28.3Back to article page