4H9J:
reference: The Structure of Classical Swine Fever Virus N(pro): A Novel Cysteine Autoprotease and Zinc-Binding Protein Involved in Subversion of Type I Interferon Induction., Gottipati K, Ruggli N, Gerber M, Tratschin JD, Benning M, Bellamy H, Choi KH, PLoS Pathog. 2013 Oct;9(10):e1003704. doi: 10.1371/journal.ppat.1003704. Epub, 2013 Oct 17. PMID: 24146623

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