title: Identification of neutral and anionic 8 alpha-substituted flavin semiquinones in flavoproteins by electron spin resonance spectroscopy.
mesh_terms: D000838:Anions; D001395:Azotobacter / Q000032:analysis; D001426:Bacterial Proteins / Q000032:analysis; D016227:Benzoquinones; D004578:Electron Spin Resonance Spectroscopy; D005415:Flavins / Q000032:analysis*; D005420:Flavoproteins / Q000032:analysis*; D005609:Free Radicals / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D011809:Quinones / Q000032:analysis*
chemical_list: D000838:Anions; D001426:Bacterial Proteins; D016227:Benzoquinones; D005415:Flavins; D005420:Flavoproteins; D005609:Free Radicals; D011809:Quinones; C025232:semiquinone radicals