3PIH:
reference: Structure of UvrA nucleotide excision repair protein in complex with modified DNA., Jaciuk M, Nowak E, Skowronek K, Tanska A, Nowotny M, Nat Struct Mol Biol. 2011 Feb;18(2):191-7. Epub 2011 Jan 16. PMID: 21240268

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).