1YVM:
reference: Metal Ions as Cofactors for the Binding of Inhibitors to Methionine Aminopeptidase: A Critical View of the Relevance of In Vitro Metalloenzyme Assays., Schiffmann R, Heine A, Klebe G, Klein CD, Angew Chem Int Ed Engl 2005 Jun 6;44(23):3620-3623. PMID: 15880695

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