1UR5:
reference: Stabilization of a tetrameric malate dehydrogenase by introduction of a disulfide bridge at the dimer-dimer interface., Bjork A, Dalhus B, Mantzilas D, Eijsink VG, Sirevag R, J Mol Biol 2003 Dec 5;334(4):811-21. PMID: 14636605

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