Figure 1.

PCR products from transfected BHK-21 cells at the thirtieth passage were electrophoresed through 1.0% agarose gel. The expected PCR fragments were detected in lanes 1–8, which represents the pGAPDHshRNA, pshRNA, p3D1shRNA, p3D2shRNA, p3D3shRNA, p3D4shRNA, p3D5shRNA, and the mock, respectively.