1IXY:
reference: A base-flipping mechanism for the T4 phage beta-glucosyltransferase and identification of a transition-state analog., Lariviere L, Morera S, J Mol Biol 2002 Nov 29;324(3):483-90. PMID: 12445783

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