title: Nitrogenase. IV. Simple method of purification to homogeneity of nitrogenase components from Azotobacter vinelandii.
mesh_terms: D001395:Azotobacter / Q000187:drug effects / Q000201:enzymology*; D002848:Chromatography, DEAE-Cellulose; D003460:Crystallization; D004355:Drug Stability; D004578:Electron Spin Resonance Spectroscopy; D004591:Electrophoresis, Polyacrylamide Gel; D008722:Methods; D009584:Nitrogen; D010088:Oxidoreductases / Q000032:analysis / Q000302:isolation & purification* / Q000378:metabolism; D010100:Oxygen; D010455:Peptides / Q000302:isolation & purification; D013053:Spectrophotometry; D013056:Spectrophotometry, Ultraviolet; D013447:Sulfites / Q000494:pharmacology; D013696:Temperature; D013997:Time Factors; D014462:Ultrafiltration
chemical_list: D010455:Peptides; D013447:Sulfites; D010088:Oxidoreductases; D009584:Nitrogen; D010100:Oxygen