Quaternary Ammonium CompoundsAmmonium SulfateAmmonium ChlorideAmmonium CompoundsAmmonium HydroxideAmmoniaNitrogenMethylaminesHydrogen-Ion ConcentrationNitratesGlutamate-Ammonia LigaseCation Transport ProteinsTrimethyl Ammonium CompoundsChemical PrecipitationMolecular WeightKineticsNitrosomonasGlutamate SynthaseCulture MediaFractional PrecipitationChromatography, GelGlutamineAmino AcidsChromatography, Ion ExchangeBenzalkonium CompoundsNitritesGlutamate DehydrogenaseUreaMolecular Sequence DataNitrate ReductasePII Nitrogen Regulatory ProteinsElectrophoresis, Polyacrylamide GelChromatographyTemperatureNitrogen FixationCrystallizationNitrate ReductasesNitrogen IsotopesSubstrate SpecificityAcetatesDisinfectantsCetrimonium CompoundsOxidation-ReductionMagnesium CompoundsChromatography, High Pressure LiquidBacterial ProteinsNitrificationAmino Acid SequenceBioreactorsNitrogenaseBacteria, AnaerobicPlant RootsAcidosisBiological TransportGlutamate Synthase (NADH)Chromatography, DEAE-CelluloseIsoelectric PointMethionine SulfoximineKetoglutaric AcidsNitrogen CompoundsFertilizersBacteriaGlutamate Dehydrogenase (NADP+)Acid-Base EquilibriumCarbonPlant ProteinsEscherichia coliAzospirillum brasilensePhosphatesNitrite ReductasesChemical FractionationAcidosis, Renal TubularZeolitesAnaerobiosisBicarbonatesGlutamatesCationsDrug StabilityCetylpyridiniumOxidoreductasesMutationWater PurificationCitratesSulfatesMembrane Transport ProteinsHot TemperatureSpectrometry, Mass, Electrospray IonizationChromatography, AffinityIsoelectric FocusingPotassiumAlcaligenes faecalisChemistry Techniques, AnalyticalDenitrificationEnzyme RepressionX-Ray DiffractionMolybdenumChemistrySoilEnzyme StabilityIndicators and Reagents