| 4P16: reference: Crystal structure of the papain-like protease of MERS coronavirus reveals unusual, potentially druggable active-site features., Lei J, Mesters JR, Drosten C, Anemuller S, Ma Q, Hilgenfeld R, Antiviral Res. 2014 Jun 30;109C:72-82. doi: 10.1016/j.antiviral.2014.06.011. PMID: 24992731 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).