2ITL:
reference: Structure of the origin-binding domain of simian virus 40 large T antigen bound to DNA., Bochkareva E, Martynowski D, Seitova A, Bochkarev A, EMBO J. 2006 Dec 13;25(24):5961-9. Epub 2006 Nov 30. PMID: 17139255

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