Subcellular Distribution of the Tumor-Specific Transplantation Antigen of Simian Virus 40-Transformed Cells

Abstract
TU-5, a simian virus 40 (SV40)-transformed cell line of BALB/c origin, expressed the SV40-specific T-antigen and a transplantation antigen (TSTA). Nuclei and plasma membranes were prepared from these cells and shown on the basis of the distribution of T-antigen and histocompatibility (H-2) antigens to be relatively free of cross contamination. Most of the TSTA, estimated by tumor rejection, was associated with the nuclear fraction.