| 1UK4: reference: The crystal structures of severe acute respiratory syndrome virus main protease and its complex with an inhibitor., Yang H, Yang M, Ding Y, Liu Y, Lou Z, Zhou Z, Sun L, Mo L, Ye S, Pang H, Gao GF, Anand K, Bartlam M, Hilgenfeld R, Rao Z, Proc Natl Acad Sci U S A 2003 Nov 11;100(23):13190-5. Epub 2003 Oct 29. PMID: 14585926 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).