4GJS:
reference: A Dual Anchoring Strategy for the Localization and Activation of Artificial Metalloenzymes Based on the Biotin-Streptavidin Technology., Zimbron JM, Heinisch T, Schmid M, Hamels D, Nogueira ES, Schirmer T, Ward TR, J Am Chem Soc. 2013 Apr 2. PMID: 23496309

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