| 3E5C: reference: Crystal structures of the SAM-III/S(MK) riboswitch reveal the SAM-dependent translation inhibition mechanism., Lu C, Smith AM, Fuchs RT, Ding F, Rajashankar K, Henkin TM, Ke A, Nat Struct Mol Biol. 2008 Oct;15(10):1076-83. Epub 2008 Sep 21. PMID: 18806797 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).