3KXA:
reference: The crystal structure of NGO0477 from Neisseria gonorrhoeae reveals a novel protein fold incorporating a helix-turn-helix motif., Ren J, Sainsbury S, Nettleship JE, Saunders NJ, Owens RJ, Proteins. 2010 May 15;78(7):1798-802. PMID: 20196080

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