title: Identification of sulfur as component of the EPR signal at g equals 1.94 by isotopic substitution.
mesh_terms: D001395:Azotobacter / Q000378:metabolism*; D004578:Electron Spin Resonance Spectroscopy; D011549:Pseudomonas / Q000378:metabolism*; D013057:Spectrum Analysis; D013455:Sulfur / Q000032:analysis*; D013460:Sulfur Isotopes
chemical_list: D013460:Sulfur Isotopes; D013455:Sulfur