2QNA:
reference: Structural basis for RanGTP independent entry of spliceosomal U snRNPs into the nucleus., Wohlwend D, Strasser A, Dickmanns A, Ficner R, J Mol Biol. 2007 Dec 7;374(4):1129-38. Epub 2007 Sep 29. PMID: 18028944

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