1UR4:
reference: The structure of endo-beta-1,4-galactanase from Bacillus licheniformis in complex with two oligosaccharide products., Ryttersgaard C, Le Nours J, Lo Leggio L, Jorgensen CT, Christensen LL, Bjornvad M, Larsen S, J Mol Biol. 2004 Jul 30;341(1):107-17. PMID: 15312766

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