1GBG:
reference: Crystal structure of Bacillus licheniformis 1,3-1,4-beta-D-glucan 4-glucanohydrolase at 1.8 A resolution., Hahn M, Pons J, Planas A, Querol E, Heinemann U, FEBS Lett 1995 Oct 30;374(2):221-4. PMID: 7589539

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