6BRA:
reference: A substrate selected by phage display exhibits enhanced side-chain hydrogen bonding to HIV-1 protease., Windsor IW, Raines RT, Acta Crystallogr D Struct Biol. 2018 Jul 1;74(Pt 7):690-694. doi:, 10.1107/S2059798318006691. Epub 2018 Jun 27. PMID: 29968678

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