3DOM:
reference: Structural basis for group A trichothiodystrophy., Kainov DE, Vitorino M, Cavarelli J, Poterszman A, Egly JM, Nat Struct Mol Biol. 2008 Sep;15(9):980-4. PMID: 19172752

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