ArchaeaBrassicaBacteriaMolecular Sequence DataBase SequenceGenetic LociArchaeal ProteinsGenes, ArchaealPhylogenyGram-Negative BacteriaDNA, ArchaealGram-Positive BacteriaRNA, ArchaealGenome, ArchaealRNA, Ribosomal, 16SBacteria, AnaerobicBacterial ProteinsCrenarchaeotaSequence Analysis, DNADNA, BacterialQuantitative Trait LociDNA, RibosomalMethaneEscherichia coliGene Expression Regulation, ArchaealChromosome MappingAmino Acid SequenceHaloferax volcaniiBacteria, AerobicSeawaterWater MicrobiologyMethanococcusGenes, BacterialGeologic SedimentsSulfolobusSoil MicrobiologyEvolution, MolecularBacterial Physiological PhenomenaEuryarchaeotaMethanobacteriaceaeRNA, BacterialGenome, BacterialSpecies SpecificityGenes, rRNANitrificationSulfur-Reducing BacteriaAnaerobiosisSequence AlignmentSequence Homology, Amino AcidMethanosarcinaMutationGram-Negative Anaerobic BacteriaGene Expression Regulation, BacterialGenetic LinkageCloning, MolecularPhenotypeGram-Negative Aerobic BacteriaMethanobacteriumBase CompositionAnti-Bacterial AgentsCulture MediaPolymerase Chain ReactionAmmoniaMethanosarcinalesDesulfurococcaceaeHalobacterialesColony Count, MicrobialGenetic VariationHaloferaxPyrococcusFresh WaterSulfolobus acidocaldariusProteobacteriaEukaryotaMethanosarcinaceaeGenetic MarkersPyrococcus abyssiEukaryotic CellsSymbiosisBiodiversitySulfolobus solfataricusChromosomes, ArchaealOxidation-ReductionModels, GeneticTemperatureGene Transfer, HorizontalMultigene FamilyGenotypeOxidoreductasesBiodegradation, EnvironmentalArchaeoglobus fulgidusPyrococcus furiosusPlasmidsMethanococcalesAerobiosisMicrosatellite RepeatsEcosystemDNA PrimersSequence Homology, Nucleic AcidBacterial Adhesion