Abstract
Normal mouse lymphocytes were implanted with EBV receptors and exposed to the virus of P3HR-1 strain. 5% of the cells expressed early (EA) and viral capsid (VCA) antigens as assayed by immunofluorescence 24 h after the infection. Only 0.1% of cells expressed nuclear-like antigen (EBNA) 48 h post-infection. When labelled metabolically with [ 35S]methionine, extracted, immunoprecipitated with EBV-positive sera, and analyzed by SDS-gel electrophoresis and autoradiography, about 20 EBV-determined proteins ranging from 19 to 165 kd were detected. Their pattern and relative quantitative expression differed from those in P3HR-1 virus superinfected Raji cells. Polypeptides of approximate molecular size 78, 72, 65, 48 and 26.5 kd were predominant in EBV-infected mouse lymphocytes. In contrast, 130, 98, 59, 50.5 and 36 kd proteins were predominant in the induced Raji cells. Our results demonstrate that rodent lymphocytes can be used for the direct biochemical analysis of EBV-translational products during primary lytic infection in normal cells.
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