Purification of nitrogenase and crystallization of its Mo-Fe protein.

Amino Acids/analysis Azotobacter/enzymology Chromatography, DEAE-Cellulose Crystallization Drug Stability Electron Spin Resonance Spectroscopy Evaluation Studies as Topic Hot Temperature Hydrogen/metabolism Hydrogen-Ion Concentration Iron/analysis Macromolecular Substances Magnetic Resonance Spectroscopy Metalloproteins/isolation & purification Methods Molybdenum/analysis Nitrogen Isotopes Nitrogenase/isolation & purification Protamines Solubility Spectrophotometry Spectrophotometry, Ultraviolet Spectrum Analysis Sulfhydryl Compounds/analysis Temperature

Amino Acids Macromolecular Substances Metalloproteins Nitrogen Isotopes Protamines Sulfhydryl Compounds Hydrogen Molybdenum Iron Nitrogenase