4PN7:
reference: The Structure of the TFIIH p34 Subunit Reveals a Von Willebrand Factor A Like Fold., Schmitt DR, Kuper J, Elias A, Kisker C, PLoS One. 2014 Jul 11;9(7):e102389. doi: 10.1371/journal.pone.0102389., eCollection 2014. PMID: 25013903

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