5OAR:
reference: Crystal structure of native beta-N-acetylhexosaminidase isolated from Aspergillus oryzae sheds light onto its substrate specificity, high stability, and regulation by propeptide., Skerlova J, Blaha J, Pachl P, Hofbauerova K, Kukacka Z, Man P, Pompach P, Novak P, Otwinowski Z, Brynda J, Vanek O, Rezacova P, FEBS J. 2017 Dec 14. doi: 10.1111/febs.14360. PMID: 29239122

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