1QKG:
reference: The Dewar photoproduct of thymidylyl(3'-->5')- thymidine (Dewar product) exhibits mutagenic behavior in accordance with the "A rule"., Lee JH, Bae SH, Choi BS, Proc Natl Acad Sci U S A 2000 Apr 25;97(9):4591-6. PMID: 10758155

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