6BRX:
reference: Structural Basis for Human DNA Polymerase Kappa to Bypass Cisplatin Intrastrand Cross-Link (Pt-GG) Lesion as an Efficient and Accurate Extender., Jha V, Ling H, J Mol Biol. 2018 May 25;430(11):1577-1589. doi: 10.1016/j.jmb.2018.04.023. Epub, 2018 Apr 30. PMID: 29715472

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