1S4B:
reference: Crystal structure of human thimet oligopeptidase provides insight into substrate recognition, regulation, and localization., Ray K, Hines CS, Coll-Rodriguez J, Rodgers DW, J Biol Chem 2004 May 7;279(19):20480-9. Epub 2004 Mar 3. PMID: 14998993

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