4CJB:
reference: Structures of complexes of a metal-independent glycosyltransferase GT6 from Bacteroides ovatus with UDP-GalNAc and its hydrolysis products., Pham TT, Stinson B, Thiyagarajan N, Lizotte-Waniewski M, Brew K, Acharya KR, J Biol Chem. 2014 Jan 23. PMID: 24459149

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