4U4H:
reference: The unusual fold of HSV-1 UL21, a multifunctional tegument protein., Metrick CM, Chadha P, Heldwein EE, J Virol. 2014 Dec 24. pii: JVI.03516-14. PMID: 25540382

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