2AXQ:
reference: Crystal structure of the his-tagged saccharopine reductase from Saccharomyces cerevisiae at 1.7-A resolution., Andi B, Cook PF, West AH, Cell Biochem Biophys. 2006;46(1):17-26. PMID: 16943620

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