1OKK:
reference: Heterodimeric GTPase core of the SRP targeting complex., Focia PJ, Shepotinovskaya IV, Seidler JA, Freymann DM, Science 2004 Jan 16;303(5656):373-7. PMID: 14726591

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