title: Electron-spin resonance studies of the structure and formation of bacterial diazodiphenoquinone pigments.
abstract: The formation of diazodiphenoquinone pigments during bacterial oxidations of pyridinediols can be accounted for in terms of a free-radical mechanism similar to that operating for oxidations in vitro involving azasemiquinone radicals. Electron-spin-resonance spectra are of great value in pigment structure determinations.
mesh_terms: D001173:Arthrobacter / Q000378:metabolism; D001391:Azo Compounds / Q000096:biosynthesis; D003979:Diazonium Compounds; D004578:Electron Spin Resonance Spectroscopy; D010860:Pigments, Biological / Q000096:biosynthesis; D011725:Pyridines / Q000378:metabolism; D011809:Quinones / Q000096:biosynthesis
chemical_list: D001391:Azo Compounds; D003979:Diazonium Compounds; D010860:Pigments, Biological; D011725:Pyridines; D011809:Quinones; C009867:diazodiphenoquinone