3TND:
reference: Crystal Structure of the VapBC Toxin-Antitoxin Complex from Shigella flexneri Reveals a Hetero-Octameric DNA-Binding Assembly., Dienemann C, Boggild A, Winther KS, Gerdes K, Brodersen DE, J Mol Biol. 2011 Oct 20. PMID: 22037005

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