title: Photochemical and gamma-ray-induced reactions of nucleic acid constituents. Suppression of the reactivity of pyrimidines in the presence of purines.
mesh_terms: D010777:Photochemistry; D011687:Purines / Q000528:radiation effects*; D011743:Pyrimidines / Q000528:radiation effects*; D011830:Radiation Effects; D013941:Thymine / Q000528:radiation effects; D014466:Ultraviolet Rays; D014498:Uracil / Q000528:radiation effects
chemical_list: D011687:Purines; D011743:Pyrimidines; D014498:Uracil; D013941:Thymine