[Membrane antigens of transformed and tumor cells of hamsters]

Normal membrane antigens to tumour and in vitro transformed tissue cultures of Syrian hamster cells were comparatively studied in cross-adsorption experiments. It was found that each cell strain has an individual profile of normal membrane antigens with characteristic quantitative and qualitative features seen on antigen expression. The absence of at least one of the antigens which the cells of other strains possessed was demonstrated with reference to the cells of each line tested. All 5 tumor cell lines were bearing antigen or a group of antigens absent on normal embryonic hamster cells (HE) and 5-strains of in vitro transformed HE cells.