4OIH:
reference: Structural Characterisation of the Nuclear Import Receptor Importin Alpha in Complex with the Bipartite NLS of Prp20., Roman N, Christie M, Swarbrick CM, Kobe B, Forwood JK, PLoS One. 2013 Dec 10;8(12):e82038. doi: 10.1371/journal.pone.0082038., eCollection 2013. PMID: 24339986

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