2FH5:
reference: The structure of the mammalian signal recognition particle (SRP) receptor as prototype for the interaction of small GTPases with Longin domains., Schlenker O, Hendricks A, Sinning I, Wild K, J Biol Chem. 2006 Mar 31;281(13):8898-906. Epub 2006 Jan 26. PMID: 16439358

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