1VTM:
reference: Structure of the U2 strain of tobacco mosaic virus refined at 3.5 A resolution using X-ray fiber diffraction., Pattanayek R, Stubbs G, J Mol Biol 1992 Nov 20;228(2):516-28. PMID: 1453461

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