Nitrogen CycleSulfurNitrogen FixationNitrogen CompoundsNitrificationDenitrificationSulfur CompoundsNitrogenCell CyclePlanctomycetalesQuaternary Ammonium CompoundsCrenarchaeotaNitrogen IsotopesArchaeaSulfur DioxideAmmoniaSulfur IsotopesNitrite ReductasesAmino Acids, SulfurNitratesSeawaterNitritesBacteriaOxidation-ReductionGeologic SedimentsGenes, ArchaealOceans and SeasDNA, ArchaealEcosystemSoil MicrobiologyNitrous OxidePhylogenySoilNitrogen DioxideClimate ChangeAgricultureBlood Urea NitrogenMustard GasMolecular Sequence DataTreesOxidoreductasesSulfidesMenstrual CycleBiodiversityThiosulfatesSulfur OxidesRNA, Ribosomal, 16SReactive Nitrogen SpeciesNitrogen OxidesSequence Analysis, DNACarbonGenome, BacterialCell Cycle ProteinsSulfatesChlorobiPII Nitrogen Regulatory ProteinsOxidoreductases Acting on Sulfur Group DonorsFertilizersSulfur HexafluorideChemical Warfare AgentsEstrous CycleCitric Acid CycleChromatiaceaeSulfurtransferasesCysteineSulfur AcidsMethionineAmino AcidsBacterial ProteinsHydrogen SulfideUreaAir PollutantsChlorobiumGlutamate-Ammonia LigaseCulture MediaSulfites