2DIK:
reference: Location of the phosphate binding site within Clostridium symbiosum pyruvate phosphate dikinase., McGuire M, Huang K, Kapadia G, Herzberg O, Dunaway-Mariano D, Biochemistry 1998 Sep 29;37(39):13463-74. PMID: 9753432

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