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EC Number	General Information	Commentary	Reference
2.4.1.44	physiological function	WbbY possesses two glycosyltransferase catalytic sites solely responsible for O1 antigen polymerization and forming a complex with the O2a glycosyltransferase WbbM. The C-terminal WbbY domain is a UDP-galactopyranoside-dependent GT-A galactosyltransferase adding beta-(1-3)-linked D-galalctopyranoside, whereas the WbbY N-terminus includes a GT-B enzyme adding alpha-(1-3)-linked D-galactofuranoside. These activities build the O1 antigen on a terminal galactopyranoside in the O2a domain	757218

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Release 2023.1 (January 2023)