1FY2:
reference: The structure of aspartyl dipeptidase reveals a unique fold with a Ser-His-Glu catalytic triad., Hakansson K, Wang AH, Miller CG, Proc Natl Acad Sci U S A 2000 Dec 19;97(26):14097-102. PMID: 11106384

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