2VTF:
reference: The X-ray Crystal Structure of an Arthrobacter protophormiae Endo-beta-N-Acetylglucosaminidase Reveals a (beta/alpha)(8) Catalytic Domain, Two Ancillary Domains, and Active-Site Residues as Keys for Transglycosylation Activity., Suits MD, Ling Z, Bingham RJ, Bruce NC, Davies GJ, Fairbanks AJ, Moir JW, Taylor EJ, J Mol Biol. 2009 Mar 24. PMID: 19327363

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