4YM6:
reference: Structural basis of pyrimidine-pyrimidone (6-4) photoproduct recognition by UV-DDB in the nucleosome., Osakabe A, Tachiwana H, Kagawa W, Horikoshi N, Matsumoto S, Hasegawa M, Matsumoto N, Toga T, Yamamoto J, Hanaoka F, Thoma NH, Sugasawa K, Iwai S, Kurumizaka H, Sci Rep. 2015 Nov 17;5:16330. doi: 10.1038/srep16330. PMID: 26573481

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