Far-UV irradiation of DNA leads to the formation of several types of dimeric lesions between adjacent pyrimidine bases including cyclobutane dimers, (6-4) photoproducts and Dewar valence isomers. In the dry state, an additional specific thymine lesion, the spore photoproduct, is produced. We designed an HPLC-tandem mass spectrometry assay for the detection of the latter lesion. This technique that does not require radio-labelling of DNA allowed the simultaneous quantification of the spore photoproduct and other pyrimidine dimeric photoproducts. Using this approach, the complete distribution of bipyrimidine lesions within UVC-irradiated dry DNA was determined. © The Royal Society of Chemistry and Owner Societies 2003.
CITATION STYLE
Douki, T., & Cadet, J. (2003). Formation of the spore photoproduct and other dimeric lesions between adjacent pyrimidines in UVC-irradiated dry DNA. Photochemical and Photobiological Sciences, 2(4), 433–436. https://doi.org/10.1039/b300173c
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