8PCH:
reference: Crystal structure of porcine cathepsin H determined at 2.1 A resolution: location of the mini-chain C-terminal carboxyl group defines cathepsin H aminopeptidase function., Guncar G, Podobnik M, Pungercar J, Strukelj B, Turk V, Turk D, Structure 1998 Jan 15;6(1):51-61. PMID: 9493267

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