4ZDW:
reference: New insights into the molecular mechanism of the Rab GTPase Sec4p activation., Rinaldi FC, Packer M, Collins R, BMC Struct Biol. 2015 Aug 12;15:14. doi: 10.1186/s12900-015-0041-5. PMID: 26263895

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