1IDB:
reference: Crystal structures of HIV-2 protease in complex with inhibitors containing the hydroxyethylamine dipeptide isostere., Tong L, Pav S, Mui S, Lamarre D, Yoakim C, Beaulieu P, Anderson PC, Structure 1995 Jan 15;3(1):33-40. PMID: 7743130

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