2C34:
reference: The structure of Leishmania mexicana ICP provides evidence for convergent evolution of cysteine peptidase inhibitors., Smith BO, Picken NC, Westrop GD, Bromek K, Mottram JC, Coombs GH, J Biol Chem. 2006 Mar 3;281(9):5821-8. Epub 2005 Dec 28. PMID: 16407198

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