4CA8:
reference: Crystal structures of highly specific phosphinic tripeptide enantiomers in complex with the angiotensin-I converting enzyme., Masuyer G, Akif M, Czarny B, Beau F, Schwager SL, Sturrock ED, Isaac RE, Dive V, Acharya KR, FEBS J. 2013 Nov 29. doi: 10.1111/febs.12660. PMID: 24289879

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