2IF9:
reference: The Crystal Structure of the SV40 T-Antigen Origin Binding Domain in Complex with DNA., Meinke G, Phelan P, Moine S, Bochkareva E, Bochkarev A, Bullock PA, Bohm A, PLoS Biol. 2007 Jan 23;5(2):e23. PMID: 17253903

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