[Detection, by direct lymphocyte immunocytotoxicity, of antigens in cells transformed by Rous virus]

The hamster cells transformed by the Rous Sarcoma Virus (V.S.R.) evidenced surface antigenic alterations that were detected by a method of cellular mediated immunocytotoxicity. Immune hamster lymphocytes were added to tritiated proline prelabeled target cells. These lymphocytes were able to lyse specifically the V.S.R. transformed cells.