6DGN:
reference: Structural basis of DSF recognition by its receptor RpfR and its regulatory interaction with the DSF synthase RpfF., Waldron EJ, Snyder D, Fernandez NL, Sileo E, Inoyama D, Freundlich JS, Waters CM, Cooper VS, Neiditch MB, PLoS Biol. 2019 Feb 4;17(2):e3000123. doi: 10.1371/journal.pbio.3000123., eCollection 2019 Feb. PMID: 30716063

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