6NCX:
reference: Selecting a Single Stereocenter: The Molecular Nuances That Differentiate beta-Hexuronidases in the Human Gut Microbiome., Pellock SJ, Walton WG, Redinbo MR, Biochemistry. 2019 Feb 18. doi: 10.1021/acs.biochem.8b01285. PMID: 30729778

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