3PUU:
reference: Discovery of alpha,beta- and alpha,gamma-Diamino Acid Scaffolds for the Inhibition of M1 Family Aminopeptidases., Gumpena R, Kishor C, Ganji RJ, Addlagatta A, ChemMedChem. 2011 Nov 4;6(11):1971-6. doi: 10.1002/cmdc.201100298. Epub, 2011 Aug 16. PMID: 22025387

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