2KMG:
reference: The structure of the KlcA and ArdB proteins reveals a novel fold and antirestriction activity against Type I DNA restriction systems in vivo but not in vitro., Serfiotis-Mitsa D, Herbert AP, Roberts GA, Soares DC, White JH, Blakely GW, Uhrin D, Dryden DT, Nucleic Acids Res. 2009 Dec 9. PMID: 20007596

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