| 3AGO: reference: Isomerization mechanism of aspartate to isoaspartate implied by structures of Ustilago sphaerogena ribonuclease U2 complexed with adenosine 3'-monophosphate., Noguchi S, Acta Crystallogr D Biol Crystallogr. 2010 Jul;66(Pt 7):843-9. Epub 2010 Jun 19. PMID: 20606265 |
This OCA 
Structure page
uses Jmol,
developed by the Jmol Development Team
(documentation).