1NKG:
reference: Rhamnogalacturonan lyase reveals a unique three-domain modular structure for polysaccharide lyase family 4., McDonough MA, Kadirvelraj R, Harris P, Poulsen JC, Larsen S, FEBS Lett 2004 May 7;565(1-3):188-94. PMID: 15135077

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