3MK8:
reference: The MCL-1 BH3 helix is an exclusive MCL-1 inhibitor and apoptosis sensitizer., Stewart ML, Fire E, Keating AE, Walensky LD, Nat Chem Biol. 2010 Aug;6(8):595-601. Epub 2010 Jun 20. PMID: 20562877

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