title: Biological nitrogen fixation.
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D001395:Azotobacter / Q000378:metabolism*; D003013:Clostridium / Q000378:metabolism*; D003035:Cobalt / Q000378:metabolism; D003901:Desulfovibrio / Q000378:metabolism; D005431:Florida; D007709:Klebsiella / Q000378:metabolism; D009586:Nitrogen Fixation; D010946:Plants, Medicinal / Q000378:metabolism; D011868:Radioisotopes; D012231:Rhizobium / Q000378:metabolism; D014481:United States
chemical_list: D011868:Radioisotopes; D003035:Cobalt; D000255:Adenosine Triphosphate