title: The odd couple.
mesh_terms: D001669:Biochemical Phenomena; D001671:Biochemistry; D008982:Molybdenum / Q000378:metabolism*; D009584:Nitrogen / Q000378:metabolism*; D010084:Oxidation-Reduction; D012231:Rhizobium / Q000502:physiology
chemical_list: D008982:Molybdenum; D009584:Nitrogen