4XCO:
reference: Signal-sequence induced conformational changes in the signal recognition particle., Hainzl T, Sauer-Eriksson AE, Nat Commun. 2015 Jun 8;6:7163. doi: 10.1038/ncomms8163. PMID: 26051119

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