Expression of proteins derived from D87-wt, D-VI and D-CEF. (A, B, C) A549 cells were infected with vTF7-3 and transfected with the indicated pTM1-derived plasmids. (D) Vero cells were transfected with the indicated pCAGGS-derived plasmids. In all cases, proteins were labeled with 35S-methionine, precipitated with protein-specific antisera and separated by SDS-PAGE. Molecular mass markers (kDa) are shown on the left in each panel, the positions of proteins are indicated on the right.