1BYH:
reference: Molecular and active-site structure of a Bacillus 1,3-1,4-beta-glucanase., Keitel T, Simon O, Borriss R, Heinemann U, Proc Natl Acad Sci U S A 1993 Jun 1;90(11):5287-91. PMID: 8099449

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