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- W2022285434 abstract "The antigens of rat embryo fibroblasts (REF) and of rat Rous sarcoma cells (derived by in vivo passage of oncogenically transformed REF) were studied using the technique of non-ionic detergent solubilization of radiolabelled cells. Solubilized antigens were complexed with rat immune IgG, and precipitation of the complexes was accomplished with rabbit anti-rat IgG. The precipitated radiolabelled antigens were then dissolved in sodium dodecyl sulfate and separated by polyacrylamide gel electrophoresis. This investigation disclosed the existence of cell surface antigenic proteins which are derived from the fetal calf serum (FCS) used in the cell-culture medium. These FCS-dependent antigens include at least three molecular species of approximate molecular weights 95,000, 80,000 and 98,000 daltons. They are probably derived from simple adsorption of FCS proteins to the cell surface, although more complex interactions are possible. One of these proteins (95,000 daltons) is of particular interest. It tenaciously adheres to the cell surface so that a trace amount remains even after subculture in the absence of FCS. Rat Rous sarcomas which are morphologically highly transformed appear to bind very little or none of this protein to their surfaces, whereas untransformed rat embryo fibroblasts bind large quantities. A rat Rous sarcoma line which is intermediate in morphological transformation binds an intermediate amount of this antigen. These findings invite speculation that the interaction of certain serum components with the cell surface may be related to plasma membrane properties which distinguish untransformed and transformed cells." @default.
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- W2022285434 date "1977-11-15" @default.
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- W2022285434 title "Immunologic identification of fetal calf serum-derived proteins on the surfaces of cultured transformed and untransformed rat cells" @default.
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- W2022285434 doi "https://doi.org/10.1002/ijc.2910200520" @default.
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