5E4F:
reference: The Spring alpha-Helix Coordinates Multiple Modes of HCV NS3 Helicase Action., Gu M, Rice CM, J Biol Chem. 2016 May 12. pii: jbc.M115.704379. PMID: 27226535

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