6DDU:
reference: The structure of mammalian beta-mannosidase provides insight into beta-mannosidosis and nystagmus., Gytz H, Liang J, Liang Y, Gorelik A, Illes K, Nagar B, FEBS J. 2018 Dec 15. doi: 10.1111/febs.14731. PMID: 30552791

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