1XGD:
reference: The structure of Apo R268A human aldose reductase: hinges and latches that control the kinetic mechanism., Bohren KM, Brownlee JM, Milne AC, Gabbay KH, Harrison DH, Biochim Biophys Acta 2005 May 15;1748(2):201-12. PMID: 15769597

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