5C3N:
reference: Critical Assessment of the Important Residues Involved in the Dimerization and Catalysis of MERS Coronavirus Main Protease., Ho BL, Cheng SC, Shi L, Wang TY, Ho KI, Chou CY, PLoS One. 2015 Dec 14;10(12):e0144865. doi: 10.1371/journal.pone.0144865., eCollection 2015. PMID: 26658006

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