2‘-Deoxyguanosine (DG) Oxidation and Strand-Break Formation in DNA by the Radicals Released in the Photolysis of <i>N</i>-<i>tert</i>-Butoxy-2-pyridone. Are <i>tert</i>-Butoxyl or Methyl Radicals Responsible for the Photooxidative Damage in Aqueous Media?
作者:Waldemar Adam、Stefan Marquardt、Diana Kemmer、Chantu R. Saha-Möller、Peter Schreier
DOI:10.1021/ol016955j
日期:2002.1.1
releases tert-butoxyl radicals, which have been trapped by DMPO and EPR-spectrally identified. In aqueous solution, however, the fragmentation of the tert-butoxyl into methyl radicals prevails and the former radicals are of no direct consequence in the photooxidation of 2'-deoxyguanosine (dG) and pBR 322 DNA. The photooxidative damage of nucleic acids is caused by the oxyl radical species generated from