2V6E:
reference: An Interlocked Dimer of the Protelomerase TelK Distorts DNA Structure for the Formation of Hairpin Telomeres., Aihara H, Huang WM, Ellenberger T, Mol Cell. 2007 Sep 21;27(6):901-13. PMID: 17889664

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