3FY4:
reference: Functional motifs in the (6-4) photolyase crystal structure make a comparative framework for DNA repair photolyases and clock cryptochromes., Hitomi K, Ditacchio L, Arvai AS, Yamamoto J, Kim ST, Todo T, Tainer JA, Iwai S, Panda S, Getzoff ED, Proc Natl Acad Sci U S A. 2009 Apr 9. PMID: 19359474

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