2NXU:
reference: Solution structure of the beta-subunit of the translation initiation factor aIF2 from archaebacteria Sulfolobus solfataricus., Vasile F, Pechkova E, Nicolini C, Proteins. 2008 Feb 15;70(3):1112-5. PMID: 18004773

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