2HAH:
reference: Crystal structure of an FIV/HIV chimeric protease complexed with the broad-based inhibitor, TL-3., Heaslet H, Lin YC, Tam K, Torbett BE, Elder JH, Stout CD, Retrovirology. 2007 Jan 9;4:1. PMID: 17212810

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