Fig. 4From: Porcine circovirus type 2 ORF3 protein induces apoptosis in melanoma cellsLack of expression of the active form of caspase 3 in B16F10 cells transfected with ORF3. B16F10 (a) and PK15 (b) cells overexpressing ORF3 were stained intracellularly with an anti-caspase3 (active form) mAb (blue line). Cells stained with the secondary (anti-mouse Igκ) Ab are shown as negative controls (black line)Back to article page