Figure 4From: Fusion to chicken C3d enhances the immunogenicity of the M2 protein of avian influenza virusExpression in BHK-21 cells of pcDNA-sM2 and pcDNA-C3d-L1-C3d-L2-sM2 as detected by IFA. (a) Transfection of pcDNA (200×); (b) Transfection of pcDNA-sM2 (200×); (c) Transfection of pcDNA-C3d-L1-C3d-L2-sM2 (200×).Back to article page