4OJZ:
reference: Structure of a PL17 Family Alginate Lyase Demonstrates Functional Similarities among Exotype Depolymerases., Park D, Jagtap S, Nair SK, J Biol Chem. 2014 Mar 21;289(12):8645-55. doi: 10.1074/jbc.M113.531111. Epub 2014, Jan 29. PMID: 24478312

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