Steven E. Freeman, Richard W. Gange, John C. Sutherland, Betsy M. Sutherland

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


Cyclobutyl pyrimidine dimers are major photoproducts formed upon irradiation of DNA with ultraviolet light. We have developed a method for detecting as few as one pyrimidine dimer per million bases in about 50 ng of non‐radioactive DNA, and have used this method to quantitate dimer yields in human skin DNA exposed in situ to UV. We found that UVA radiation (320–400 nm) produces detectable levels of dimers in the DNA of human skin. We also measured UVB‐induced dimer yields in skin of individuals of differing sun sensitivity and found higher yields in individuals with higher UVB minimal erythema doses and greater sun sensitivity. These approaches should provide important information on damage induced in human skin upon exposure to natural or artificial sources of ultraviolet radiation.

Original languageEnglish (US)
Pages (from-to)207-212
Number of pages6
JournalPhotochemistry and Photobiology
Issue number2
StatePublished - Aug 1987
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry

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