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Rous sarcoma virus (RSV)-specific ribonucleic acid (RNA) in virus-producing chicken cells and non-virus-producing rat cells infected with RSV was studied by hybridization with the endogenous deoxyribonucleic acid (DNA) product of the RSV virion DNA polymerase system. By hybridizing the total DNA product with excess virion RNA, the product DNA was separated into hybridized (“minus”) and nonhybridized (“plus”) DNA. The “minus” DNA was complementary to at least 20% of the RNA from RSV which remained of high molecular weight after denaturation. A maximum of approximately 65% hybridization was observed between “minus” DNA and RSV RNA or RSV-infected chicken cell RNA. A maximum of about 60% hybridization was observed between “minus” DNA and RSV-infected rat cell RNA. RSV-infected chicken cells contained RSV-specific RNA equivalent to about 6,000 virions per cell. RSV-infected rat cells contained RSV-specific RNA equivalent to approximately 400 virions per cell. Neither cell type contained detectable RNA complementary to virion RNA. The RSV-specific RNA in RSV-infected rat cells did not appear to be qualitatively different from that in RSV-infected chicken cells.

journal of virology

Hybridization of Rous Sarcoma Virus Deoxyribonucleic Acid Polymerase Product and Ribonucleic Acids from Chicken and Rat Cells Infected with Rous Sarcoma Virus