ArchaeaBacteriaArchaeal ProteinsGenes, ArchaealGram-Negative BacteriaDNA, ArchaealGram-Positive BacteriaPhylogenyRNA, ArchaealGenome, ArchaealMolecular Sequence DataRNA, Ribosomal, 16SBacteria, AnaerobicCrenarchaeotaBacterial ProteinsDNA, BacterialMethaneDNA, RibosomalGene Expression Regulation, ArchaealSequence Analysis, DNAHaloferax volcaniiEscherichia coliBacteria, AerobicSeawaterWater MicrobiologyMethanococcusGeologic SedimentsAmino Acid SequenceSulfolobusSoil MicrobiologyBacterial Physiological PhenomenaEuryarchaeotaMethanobacteriaceaeRNA, BacterialGenes, BacterialGenes, rRNANitrificationSulfur-Reducing BacteriaGenome, BacterialAnaerobiosisBase SequenceMethanosarcinaGram-Negative Anaerobic BacteriaGram-Negative Aerobic BacteriaMethanobacteriumEvolution, MolecularMethanosarcinalesDesulfurococcaceaeAmmoniaSequence AlignmentHalobacterialesSequence Homology, Amino AcidBase CompositionAnti-Bacterial AgentsSpecies SpecificityCulture MediaColony Count, MicrobialGene Expression Regulation, BacterialHaloferaxPyrococcusSulfolobus acidocaldariusProteobacteriaEukaryotaFresh WaterMethanosarcinaceaePyrococcus abyssiSymbiosisEukaryotic CellsChromosomes, ArchaealBiodiversitySulfolobus solfataricusGene Transfer, HorizontalOxidation-ReductionArchaeoglobus fulgidusBiodegradation, EnvironmentalMethanococcalesPyrococcus furiosusAerobiosisTemperatureOxidoreductasesCloning, MolecularEcosystemThermococcusHalobacteriaceaeAutotrophic ProcessesMethanosarcina barkeriBacterial AdhesionBiofilmsProkaryotic CellsDeltaproteobacteriaPseudomonasGammaproteobacteriaModels, MolecularEnterobacteriaceaeArchaeal VirusesFermentationHot TemperatureHydrogen-Ion ConcentrationSulfurGlyceryl Ethers