1MAP:
reference: Crystal structures of true enzymatic reaction intermediates: aspartate and glutamate ketimines in aspartate aminotransferase., Malashkevich VN, Toney MD, Jansonius JN, Biochemistry 1993 Dec 14;32(49):13451-62. PMID: 7903048

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