AmmoniaArchaeaArchaeal ProteinsGenes, ArchaealDNA, ArchaealRNA, ArchaealGenome, ArchaealCrenarchaeotaNitrificationPhylogenyGene Expression Regulation, ArchaealMethaneBacteriaHaloferax volcaniiMethanococcusMolecular Sequence DataSulfolobusNitrogenNitrosomonasMethanobacteriaceaeEuryarchaeotaCarbamoyl-Phosphate Synthase (Ammonia)MethanosarcinaGlutamineRNA, Ribosomal, 16SHyperammonemiaUreaGlutamate-Ammonia LigaseMethanobacteriumDesulfurococcaceaeSeawaterMethanosarcinalesAmmonium ChlorideHalobacterialesHaloferaxNitrogen RadioisotopesGeologic SedimentsPyrococcusSulfolobus acidocaldariusMethanosarcinaceaePyrococcus abyssiAutotrophic ProcessesChromosomes, ArchaealSulfolobus solfataricusAmino Acid SequenceMethanococcalesArchaeoglobus fulgidusPyrococcus furiosusEvolution, MolecularOxidoreductasesHydrogen-Ion ConcentrationEukaryotaThermococcusEukaryotic CellsMethanosarcina barkeriOxidation-ReductionHalobacteriaceaeSequence Analysis, DNADNA, RibosomalArchaeal VirusesSequence AlignmentManureGlutaminaseGlyceryl EthersAmino AcidsThermoplasmaSequence Homology, Amino AcidBiodiversityHepatic EncephalopathySoil MicrobiologyBioreactorsBase SequenceRumenAnaerobiosisBacterial ProteinsNitrosomonas europaeaGlutamate DehydrogenaseHaloferax mediterraneiProkaryotic CellsThermoproteaceaeEcosystemHalobacterium salinarumWater MicrobiologyQuaternary Ammonium CompoundsModels, MolecularEscherichia coliThermoplasmalesGenes, rRNAPhenylalanine Ammonia-LyaseFresh WaterGene Transfer, HorizontalGillsNitrogen CompoundsGlutamate SynthaseMethanobrevibacterBiotaChemoautotrophic GrowthGenome, BacterialAcetyleneDNA, Bacterial