6BKG:
reference: Structures of DNA-bound human ligase IV catalytic core reveal insights into substrate binding and catalysis., Kaminski AM, Tumbale PP, Schellenberg MJ, Williams RS, Williams JG, Kunkel TA, Pedersen LC, Bebenek K, Nat Commun. 2018 Jul 6;9(1):2642. doi: 10.1038/s41467-018-05024-8. PMID: 29980672

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