Characterization of viral RNA in cells transformed by various isolates of Moloney murine sarcoma virus

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 ml-MuSV isolate, 5.2 kb for the m3- and 124-MuSV, 6.1 kb for the HTl-MuSV and 6.7 kb for the 78-Al-MuSV were determined. With the exception of the ml 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.