1QR6:
reference: Crystal structure of human mitochondrial NAD(P)(+)-dependent malic enzyme: a new class of oxidative decarboxylases., Xu Y, Bhargava G, Wu H, Loeber G, Tong L, Structure Fold Des 1999;7(8):877-889. PMID: 10467136

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