1WSU:
reference: Structural basis for mRNA recognition by elongation factor SelB., Yoshizawa S, Rasubala L, Ose T, Kohda D, Fourmy D, Maenaka K, Nat Struct Mol Biol 2005 Feb;12(2):198-203. Epub 2005 Jan 23. PMID: 15665870

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