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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Polypeptide maps of cells infected with murine type C leukemia or sarcoma oncovirus.

The polypeptide composition of murine fibroblast cells and the effect of infection by RNA sarcoma and leukemia viruses were analyzed by two-dimensional gel electrophoresis and tryptic peptide mapping. The polypeptide maps of NIH Swiss mouse embryo fibroblasts (NIH/3T3) and BALB/c mouse embryo fibroblasts (BALB/3T3) were very similar except for two major polypeptides of about 65,000 and 75,000 daltons which were not detected in BALB/3T3 cells. NIH/3T3 cells infected with either Rauscher or Gross oncoviruses and outbred Swiss mouse embryo fibroblasts (3T3 FL) showed two major polypeptrides of about 73,000 and 80,000 daltons not found in uninfected NIH/3T3 cells. The 3T3 FL cells, although uninfected, were also found to contain a high concentration of envelope glycoprotein of an endogenous oncovirus. 3T3 FL cells transformed by Moloney sarcoma virus showed changes in many polypeptides, including several major components: the disappearance or modification of a component of 60,000 daltons, an increased concentration and shift in pl of a glycoprotein of 48,000 daltons, and the apparent loss of several smaller polypeptides. None of the major changes of the transformed cells were associated with cell surface proteins labeled by lactoperoxidase-catalyzed iodination.[1]


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