4OUI:
reference: Structural basis of chitin oligosaccharide deacetylation., Andres E, Albesa-Jove D, Biarnes X, Moerschbacher BM, Guerin ME, Planas A, Angew Chem Int Ed Engl. 2014 Jul 1;53(27):6882-7. doi: 10.1002/anie.201400220., Epub 2014 May 8. PMID: 24810719

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