| 2G9C: reference: Modified pyrimidines specifically bind the purine riboswitch., Gilbert SD, Mediatore SJ, Batey RT, J Am Chem Soc. 2006 Nov 8;128(44):14214-5. PMID: 17076468 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).