2WPO:
reference: Conserved mode of peptidomimetic inhibition and substrate recognition of human cytomegalovirus protease., Tong L, Qian C, Massariol MJ, Deziel R, Yoakim C, Lagace L, Nat Struct Biol 1998 Sep;5(9):819-26. PMID: 9731777

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