title: Nitrogenase complex and its components.
mesh_terms: D000535:Aluminum; D000693:Anaerobiosis; D001395:Azotobacter / Q000187:drug effects / Q000201:enzymology; D002413:Cations, Divalent; D002845:Chromatography; D002848:Chromatography, DEAE-Cellulose; D002849:Chromatography, Gas; D002850:Chromatography, Gel; D005069:Evaluation Studies as Topic; D006859:Hydrogen / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D046911:Macromolecular Substances; D008274:Magnesium / Q000494:pharmacology; D008722:Methods; D009591:Nitrogenase / Q000302:isolation & purification / Q000378:metabolism*; D013053:Spectrophotometry; D013056:Spectrophotometry, Ultraviolet; D014462:Ultrafiltration
chemical_list: D002413:Cations, Divalent; D046911:Macromolecular Substances; D006859:Hydrogen; D000535:Aluminum; D009591:Nitrogenase; D008274:Magnesium