3BBZ:
reference: Structure of the Nucleocapsid-Binding Domain from the Mumps Virus Polymerase; an Example of Protein Folding Induced by Crystallization., Kingston RL, Gay LS, Baase WS, Matthews BW, J Mol Biol. 2008 Jan 11;. PMID: 18468621

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