3P7O:
reference: Identification of the allosteric regulatory site of insulysin., Noinaj N, Bhasin SK, Song ES, Scoggin KE, Juliano MA, Juliano L, Hersh LB, Rodgers DW, PLoS One. 2011;6(6):e20864. Epub 2011 Jun 24. PMID: 21731629

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