3KQH:
reference: Three conformational snapshots of the hepatitis C virus NS3 helicase reveal a ratchet translocation mechanism., Gu M, Rice CM, Proc Natl Acad Sci U S A. 2010 Jan 12;107(2):521-8. Epub 2009 Dec 31. PMID: 20080715

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