5TYZ:
reference: Time-lapse crystallography snapshots of a double-strand break repair polymerase in action., Jamsen JA, Beard WA, Pedersen LC, Shock DD, Moon AF, Krahn JM, Bebenek K, Kunkel TA, Wilson SH, Nat Commun. 2017 Aug 15;8(1):253. doi: 10.1038/s41467-017-00271-7. PMID: 28811466

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