ArchaeaArchaeal ProteinsGenes, ArchaealDNA, ArchaealRNA, ArchaealGenome, ArchaealCrenarchaeotaPhylogenyGene Expression Regulation, ArchaealHaloferax volcaniiMolecular Sequence DataMethaneBacteriaMethanococcusSulfolobusMethanobacteriaceaeHost SpecificityEuryarchaeotaMethanosarcinaNitrificationDesulfurococcaceaeMethanobacteriumRNA, Ribosomal, 16SMethanosarcinalesHalobacterialesHaloferaxAmino Acid SequencePyrococcusSulfolobus acidocaldariusEvolution, MolecularMethanosarcinaceaePyrococcus abyssiChromosomes, ArchaealSulfolobus solfataricusGeologic SedimentsSequence Analysis, DNAMethanococcalesHost-Parasite InteractionsSeawaterArchaeoglobus fulgidusPyrococcus furiosusBacterial ProteinsBase SequenceEukaryotic CellsThermococcusSequence AlignmentMethanosarcina barkeriHost-Pathogen InteractionsHalobacteriaceaeArchaeal VirusesEukaryotaAmmoniaSequence Homology, Amino AcidGlyceryl EthersThermoplasmaDNA, RibosomalEscherichia coliBiodiversityProkaryotic CellsAutotrophic ProcessesSpecies SpecificityHaloferax mediterraneiGene Transfer, HorizontalThermoproteaceaeHalobacterium salinarumGenome, BacterialDNA, BacterialThermoplasmalesEcosystemModels, MolecularGenes, BacterialMethanobrevibacterSymbiosisGenes, rRNAOxidoreductasesWater MicrobiologyHaloarcula marismortuiCloning, MolecularConserved SequenceProtein Structure, TertiarySulfolobalesBiological EvolutionBacterial Physiological PhenomenaRNA, BacterialMethanomicrobiaceaeAnaerobiosisSoil MicrobiologyRNA, TransferOxidation-ReductionArchaeoglobusTemperatureSalinityHot TemperaturePlanktonProteobacteriaOpen Reading FramesHydrothermal VentsBioreactorsRibosome Subunits, Large, ArchaealVirulence