4J2C:
reference: Structural basis for the interaction of the Golgi-Associated Retrograde Protein Complex with the t-SNARE Syntaxin 6., Abascal-Palacios G, Schindler C, Rojas AL, Bonifacino JS, Hierro A, Structure. 2013 Sep 3;21(9):1698-706. doi: 10.1016/j.str.2013.06.025. Epub 2013, Aug 8. PMID: 23932592

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