6W4E:
reference: Two Distinct Structures of Membrane-associated Homodimers of GTP- and GDP-bound KRAS4B Revealed by Paramagnetic Relaxation Enhancement., Lee KY, Fang Z, Enomoto M, Seabrook GG, Zheng L, Koide S, Ikura M, Marshall CB, Angew Chem Int Ed Engl. 2020 Mar 29. doi: 10.1002/anie.202001758. PMID: 32227412

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