3AHS:
reference: Structural changes induced by the deamidation and isomerization of asparagine revealed by the crystal structure of Ustilago sphaerogena ribonuclease U2B., Noguchi S, Biopolymers. 2010 Jul 8. PMID: 20623666

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).