1SFK:
reference: West Nile virus core protein; tetramer structure and ribbon formation., Dokland T, Walsh M, Mackenzie JM, Khromykh AA, Ee KH, Wang S, Structure (Camb) 2004 Jul;12(7):1157-63. PMID: 15242592

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