2L8K:
reference: Structure and Genetic Analysis of the Arterivirus Nonstructural Protein 7{alpha}., Manolaridis I, Gaudin C, Posthuma CC, Zevenhoven-Dobbe JC, Imbert I, Canard B, Kelly G, Tucker PA, Conte MR, Snijder EJ, J Virol. 2011 Jul;85(14):7449-53. Epub 2011 May 11. PMID: 21561912

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