1DWK:
reference: Structure of cyanase reveals that a novel dimeric and decameric arrangement of subunits is required for formation of the enzyme active site., Walsh MA, Otwinowski Z, Perrakis A, Anderson PM, Joachimiak A, Structure Fold Des 2000 May 15;8(5):505-14. PMID: 10801492

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