1ZCM:
reference: Molecular mode of action of a covalently inhibiting peptidomimetic on the human calpain protease core(,)., Li Q, Hanzlik RP, Weaver RF, Schonbrunn E, Biochemistry. 2006 Jan 24;45(3):701-8. PMID: 16411745

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