2BZF:
reference: Structural basis for DNA bridging by barrier-to-autointegration factor., Bradley CM, Ronning DR, Ghirlando R, Craigie R, Dyda F, Nat Struct Mol Biol. 2005 Oct;12(10):935-6. Epub 2005 Sep 11. PMID: 16155580

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