2IJO:
reference: Structural evidence for regulation and specificity of flaviviral proteases and evolution of the Flaviviridae fold., Aleshin AE, Shiryaev SA, Strongin AY, Liddington RC, Protein Sci. 2007 May;16(5):795-806. Epub 2007 Mar 30. PMID: 17400917

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