2OCY:
reference: A catalytic coiled coil: structural insights into the activation of the Rab GTPase Sec4p by Sec2p., Dong G, Medkova M, Novick P, Reinisch KM, Mol Cell. 2007 Feb 9;25(3):455-62. PMID: 17289591

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