title: On the origin of RNA tumor viruses.
mesh_terms: D001355:Alpharetrovirus / Q000276:immunology; D000818:Animals; D000914:Antibodies, Viral; D001354:Avian Leukosis Virus; D005075:Biological Evolution; D001717:Birds / Q000166:cytology / Q000382:microbiology; D004254:DNA Nucleotidyltransferases / Q000276:immunology; D004261:DNA Replication; D004279:DNA, Viral; D000939:Epitopes; D005796:Genes; D005838:Genotype; D006824:Hybridization, Genetic; D009500:Neutralization Tests; D009858:Oncogenic Viruses; D012328:RNA Viruses; D012367:RNA, Viral; D001356:Reticuloendotheliosis virus / Q000276:immunology; D014779:Virus Replication
chemical_list: D000914:Antibodies, Viral; D004279:DNA, Viral; D000939:Epitopes; D012367:RNA, Viral; D004254:DNA Nucleotidyltransferases