1KWS:
reference: Crystal structure of beta 1,3-glucuronyltransferase I in complex with active donor substrate UDP-GlcUA., Pedersen LC, Darden TA, Negishi M, J Biol Chem 2002 Jun 14;277(24):21869-73. PMID: 11950836

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