Nucleic AcidsNucleic Acid HybridizationCellophanePeptide Nucleic AcidsIn Situ HybridizationMolecular Sequence DataBase SequenceNucleic Acid DenaturationIn Situ Hybridization, FluorescenceSulfuric AcidsNucleic Acid ConformationDNA, BacterialDNA, CircularSequence Analysis, DNAHigh-Throughput Nucleotide SequencingCentrifugation, Density GradientDNAEscherichia coliTritiumAmino Acid SequenceDNA, ViralNucleic Acid ProbesPolymerase Chain ReactionModels, MolecularHybridization, GeneticNucleic Acid Amplification Techniques