1HZN:
reference: Intermolecular interactions between cholecystokinin-8 and the third extracellular loop of the cholecystokinin A receptor., Giragossian C, Mierke DF, Biochemistry 2001 Apr 3;40(13):3804-9. PMID: 11300760

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