4KRV:
reference: Investigations on beta1,4-galactosyltransferase I using 6-sulfo-GlcNAc as an acceptor sugar substrate., Ramakrishnan B, Moncrief AJ, Davis TA, Holland LA, Qasba PK, Glycoconj J. 2013 Aug 13. PMID: 23942731

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