5XU5:
reference: Structural and biochemical insights into the substrate-binding mechanism of a novel glycoside hydrolase family 134 beta-mannanase., You X, Qin Z, Li YX, Yan QJ, Li B, Jiang ZQ, Biochim Biophys Acta Gen Subj. 2018 Jun;1862(6):1376-1388. doi:, 10.1016/j.bbagen.2018.03.016. Epub 2018 Mar 14. PMID: 29550433

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