title: An e.s.r. study of stable radicals in gamma-irradiated single crystals of uridine 5'-phosphate (Na salt).
abstract: Electron spin resonance has been used for the study of the radical in gamma-irradiated single crystals of 5'-UMP (sodium salt). Six types of radicals have been identified at room temperature. They are formed by addition of H atoms to C5, C6, 02 and 04, and by an OH addition to C5 of the uracil ring. Five of these radicals have an appreciable spin density on C6. The radicals with the addition to C5 or C6 are less stable than than the essentially planar radicals with the H addition to 02 and 04.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D004578:Electron Spin Resonance Spectroscopy; D005720:Gamma Rays; D014500:Uracil Nucleotides / Q000528:radiation effects*; D014542:Uridine Monophosphate / Q000528:radiation effects*
chemical_list: D014500:Uracil Nucleotides; D014542:Uridine Monophosphate