4IL3:
reference: Structure of the integral membrane protein CAAX protease Ste24p., Pryor EE Jr, Horanyi PS, Clark KM, Fedoriw N, Connelly SM, Koszelak-Rosenblum M, Zhu G, Malkowski MG, Wiener MC, Dumont ME, Science. 2013 Mar 29;339(6127):1600-4. doi: 10.1126/science.1232048. PMID: 23539602

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