title: Free radicals from biological purines and pyrimidines.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D003596:Cytosine; D004247:DNA; D004578:Electron Spin Resonance Spectroscopy; D005609:Free Radicals; D006859:Hydrogen; D006878:Hydroxides; D011522:Protons; D011687:Purines / Q000528:radiation effects*; D011743:Pyrimidines / Q000528:radiation effects*; D012313:RNA; D011830:Radiation Effects; D014498:Uracil
chemical_list: D005609:Free Radicals; D006878:Hydroxides; D011522:Protons; D011687:Purines; D011743:Pyrimidines; D014498:Uracil; D012313:RNA; D006859:Hydrogen; D003596:Cytosine; D004247:DNA