1JMT:
reference: A novel peptide recognition mode revealed by the X-ray structure of a core U2AF35/U2AF65 heterodimer., Kielkopf CL, Rodionova NA, Green MR, Burley SK, Cell 2001 Sep 7;106(5):595-605. PMID: 11551507

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