MolybdenumPteridinesCoenzymesMetalloproteinsTungstenFabaceaeXanthine DehydrogenaseNitrate ReductasesAldehyde OxidaseNitrate ReductaseSulfite OxidaseSulfurtransferasesPterinsLotusXanthine OxidaseMedicago truncatulaRoot Nodules, PlantNitrogen FixationTungsten CompoundsNitrogenaseOxidoreductases Acting on Sulfur Group DonorsNitrate Reductase (NADH)Plant Root NodulationSulfurAldehyde OxidoreductasesPlants, MedicinalMedicagoMolybdoferredoxinRhodobacter capsulatusElectron Spin Resonance SpectroscopyOxidoreductasesIsotopesPlant RootsMetal Metabolism, Inborn ErrorsRhizobiumFormate DehydrogenasesLupinusBradyrhizobiumIron-Sulfur ProteinsChloratesAzotobacter vinelandiiXanthineMolecular Sequence DataCicerSinorhizobium melilotiPlant ProteinsOxidation-ReductionSulfite DehydrogenaseAzotobacterSoybeansPhaseolusRhizobiaceaeDesulfovibrio gigasSinorhizobiumMedicago sativaDithionitePeasOrganometallic CompoundsMycorrhizaeBacterial ProteinsMetalloexopeptidasesTracheobiontaSesbaniaNitrogenEscherichia coliRhizobium leguminosarumSulfitesVicia fabaTrifoliumMimosaSpectrophotometryAmino Acid SequenceLens PlantPhylogenyNitratesChlorellaTrace ElementsMilkSulfidesNitrobacterArachis hypogaeaGenes, PlantGene Expression Regulation, PlantFormatesMethanobacteriumCajanusIronPlant LectinsSequence Homology, Amino AcidHumic SubstancesCatalysisVicia