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  • Title: Viral gene expression in murine sarcoma virus(murine leukemia virus)-infected cells.
    Author: Dina D, Penhoet EE.
    Journal: J Virol; 1978 Sep; 27(3):768-75. PubMed ID: 212592.
    Abstract:
    NIH 3T3 cells infected with Moloney murine sarcoma virus (murine leukemia virus) produce virions which contain about 99% murine sarcoma virus RNA and 1% murine leukemia virus RNA. This report describes experiments which measured intracellular concentrations of proviral DNA and RNA transcripts for each of the viruses. We found that three to four copies of proviral DNA from each virus were integrated into the cellular DNA. Measurements of RNA specific for each of the genomes by hybridization to specific cDNA reagents revealed a 10- to 15-fold difference in concentration in both nuclear and polysomal RNA fractions, with murine sarcoma virus RNA predominating in both cases. Unless there are major differences in stability between the two viral RNAs, our results suggest that transcriptional control is responsible for much of the difference in final levels of virus synthesis.
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