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Characterization of Viral RNA in Cells Transformed by Various Isolates of Moloney Murine Sarcoma Virus

INSERM, U-248, Unité de Génétique et Expression des Oncogènes, Faculté de Médecine Lariboisière-Saint-Louis, 10, avenue de Verdun, 75010 Paris, France

Intracellular polyadenylated viral RNA from cells infected by five different isolates of Moloney murine sarcoma virus (Mo-MuSV) was analysed by gel transfer hybridization. Genomic sizes of 4.6 kilobases (kb) for the m1-MuSV isolate, 5.2 kb for the m3- and 124-MuSV, 6.1 kb for the HT1-MuSV and 6.7 kb for the 78-A1-MuSV were determined. With the exception of the m1 strain, subgenomic RNA species were found in cells infected by the various isolates. However, no common subgenomic RNA containing v-mos sequences could be characterized. Each transformed cell line expressed a different set of viral RNA species in terms of size and structure.

Keywords: Moloney sarcoma virus, murine sarcoma virus, intracellular, viral RNA

Received 21 February 1983; accepted 31 May 1983.