| 3C2R: reference: Comprehensive X-ray Structural Studies of the Quinolinate Phosphoribosyl Transferase (BNA6) from Saccharomyces cerevisiae., di Luccio E, Wilson DK, Biochemistry. 2008 Apr 1;47(13):4039-50. Epub 2008 Mar 6. PMID: 18321072 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).