title: Segregation of genetic information for a B-tropic leukemia virus with the structural locus for BALB:virus-1.
abstract: A B-tropic type-C RNA virus isolatable from lymphoreticular tumors of the inbred BALB/c mouse strain has previously been shown to be leukemogenic in its natural host. This virus is not chemically inducible from BALB/c embryo cells or from embryo lines containing segregating inducibility loci for two known endogenous type-C viruses of BALB/c cells. Molecular hybridization and type-specific immunologic assays demonstrate a high degree of genetic homology between the B-tropic leukemia virus and BALB:virus-1, an N-tropic endogenous virus of BALB/c cells. Genetic sequences specific for BALB:virus-1 are shown to segregate with the locus for BALB:virus-1 induction in genetic crosses between BALB/c and the noninducible NIH Swiss strain. Thus, if the information of the B-tropic virus is encoded in the genome of the animal, it must be closely linked to the structural locus for BALB:virus-1. The evidence is consistent with a mechanism by which a small genetic alteration in BALB:virus-1 leads to a virus, whose growth is unrestricted, and subsequently to the development of neoplasia.
mesh_terms: D000818:Animals; D000956:Antigens, Viral / Q000032:analysis; D002460:Cell Line; D004279:DNA, Viral / Q000032:analysis; D005796:Genes; D008040:Genetic Linkage; D009052:Leukemia Virus, Murine / Q000145:classification; D051379:Mice; D008807:Mice, Inbred BALB C / Q000382:microbiology*; D008815:Mice, Inbred Strains / Q000382:microbiology; D009693:Nucleic Acid Hybridization; D012190:Retroviridae / Q000145:classification; D013045:Species Specificity; D014764:Viral Proteins / Q000276:immunology; D014779:Virus Replication
chemical_list: D000956:Antigens, Viral; D004279:DNA, Viral; D014764:Viral Proteins