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IHC reactivity with swine PCV2 antiserum in PK-15 cells transfected with PCV2 infectious DNA clones pSK-PCV2-mORF3 and pSK-PCV2-normal. (A) PK-15 cells transfected with pSK-PCV2-normal was reacted with swine PCV2 antiserum. (B) PK-15 cells transfected with pSK-PCV2-mORF3 could not be recognized by swine PCV2 antiserum. (C) PK-15 cells infected with PCV2 virions were recognized by swine PCV2 antiserum. (D) PK-15 cells.
