Nitrogen FixationNitrogen IsotopesNitrogen CompoundsNitrogen CycleBlood Urea NitrogenNitrogen DioxideBiosynthetic PathwaysMolecular Sequence DataReactive Nitrogen SpeciesBacterial ProteinsStreptomycesNitrogen OxidesCarbonAmino Acid SequencePII Nitrogen Regulatory ProteinsMutationGenes, BacterialMultigene FamilyEscherichia coliGene Expression Regulation, BacterialNitratesAmmoniaBase SequenceCloning, MolecularKineticsAmino AcidsFertilizersGene Expression Regulation, PlantGenetic Complementation TestOxidoreductasesPlant LeavesMolecular StructureQuaternary Ammonium CompoundsPlant ProteinsPlant RootsSequence Homology, Amino AcidProtein BiosynthesisGlutamate-Ammonia LigaseCulture MediaArabidopsisTerpenesAcyltransferasesSymbiosisPeptide SynthasesPolyketide SynthasesUreaCarbon IsotopesPhylogenyChromatography, High Pressure LiquidNitrogenaseSubstrate SpecificityPlantsGlycosyltransferasesSequence Analysis, DNASoilBiomassNitrogen Mustard CompoundsChromatography, Thin LayerGenes, PlantSaccharomyces cerevisiaeGlutamineSequence AlignmentOxidation-ReductionModels, BiologicalDNA, BacterialGene Expression Regulation, FungalMethionineRNA, MessengerArabidopsis ProteinsGene DeletionMetabolic Networks and PathwaysMutagenesis, InsertionalMevalonic AcidAcetatesMagnetic Resonance SpectroscopyPlants, Genetically ModifiedTranscription, GeneticTransaminasesAlkyl and Aryl TransferasesPteridinesLyasesCyanobacteriaPhotosynthesisFermentationMass SpectrometryOperonGene Expression Regulation, EnzymologicMethyltransferasesHexosaminesSulfurFatty AcidsRecombinant ProteinsPhenotypePolyisoprenyl PhosphatesFungal ProteinsCell WallNucleotidyltransferasesPlasmidsCatalysisSeeds