4NJP:
reference: Proteolysis inside the Membrane Is a Rate-Governed Reaction Not Driven by Substrate Affinity., Dickey SW, Baker RP, Cho S, Urban S, Cell. 2013 Dec 5;155(6):1270-81. doi: 10.1016/j.cell.2013.10.053. PMID: 24315097

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