1ZPA:
reference: 1,2,3-triazole as a peptide surrogate in the rapid synthesis of HIV-1 protease inhibitors., Brik A, Alexandratos J, Lin YC, Elder JH, Olson AJ, Wlodawer A, Goodsell DS, Wong CH, Chembiochem 2005 Jul;6(7):1167-9. PMID: 15934050

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