5GLK:
reference: Crystal structure of metagenomic beta-xylosidase/ alpha-l-arabinofuranosidase activated by calcium., Matsuzawa T, Kaneko S, Kishine N, Fujimoto Z, Yaoi K, J Biochem. 2017 Sep 1;162(3):173-181. doi: 10.1093/jb/mvx012. PMID: 28204531

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