3MFV:
reference: 2-aminoimidazole amino acids as inhibitors of the binuclear manganese metalloenzyme human arginase I., Ilies M, Di Costanzo L, North ML, Scott JA, Christianson DW, J Med Chem. 2010 May 27;53(10):4266-76. PMID: 20441173

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