4LY4:
reference: Characterization of the divalent metal binding site of bacterial polysaccharide deacetylase using crystallography and quantum chemical calculations., Munan Shaik M, Bhattacharjee N, Bhattacharjee A, Field MJ, Zanotti G, Proteins. 2013 Dec 17. doi: 10.1002/prot.24497. PMID: 24346839

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