4OVW:
reference: Structure of the endoglucanase I from Fusarium oxysporum: native, cellobiose, and 3,4-epoxybutyl beta-D-cellobioside-inhibited forms, at 2.3 A resolution., Sulzenbacher G, Schulein M, Davies GJ, Biochemistry 1997 May 13;36(19):5902-11. PMID: 9153432

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