Organization of Infectious Retrovirus Genes
Transmission of RNA tumor viruses begins when virogenes are expressed and the gene products are packaged in an extracellular particle. The virus released usually grows more readily in cells from a new animal species (secondary cells) than in cells from the species that released them. The capacity to produce virus is transmitted vertically by both the first and second hosts. Expression of type-C virus information represents a spectrum of biological activities; secondarily-infected cells can produce biologically active virus, biologically inactive particles or produce no particles even though infected.
KeywordsUninfected Cell Rous Sarcoma Virus NC37 Cell Proviral Sequence Feline Leukemia Virus
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