5IJU:
reference: Activity, stability and 3-D structure of the Cu(ii) form of a chitin-active lytic polysaccharide monooxygenase from Bacillus amyloliquefaciens., Gregory RC, Hemsworth GR, Turkenburg JP, Hart SJ, Walton PH, Davies GJ, Dalton Trans. 2016 Sep 29. PMID: 27722375

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