1V81:
reference: NMR snapshots of a fluctuating protein structure: ubiquitin at 30 bar-3 kbar., Kitahara R, Yokoyama S, Akasaka K, J Mol Biol. 2005 Mar 25;347(2):277-85. PMID: 15740740

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