Nucleic AcidsNucleic Acid HybridizationNucleic Acid DenaturationDNA, ViralDNA ProbesPeptide Nucleic AcidsDNABase SequenceDNA, BacterialRNA, ViralGammaretrovirusNucleic Acid ConformationTritiumMolecular Sequence DataCellophaneOligonucleotide ProbesRNA, BacterialBiotinMethodsIndicators and ReagentsIn Situ HybridizationRetroviridaeFluorescent DyesPolymerase Chain ReactionCloning, MolecularIn Situ Hybridization, FluorescenceSulfuric AcidsCentrifugation, Density GradientGenes, ViralNucleic Acid ProbesRNADNA Restriction EnzymesRNA-Directed DNA PolymeraseSpecies SpecificityEscherichia coliAntigens, ViralCell LineNucleic Acid Amplification TechniquesDNA, CircularHybridization, GeneticMicropore FiltersKineticsRNA, MessengerModels, MolecularOligonucleotides