Glycosyltransferase that can synthesize all known mucin beta 6 N-acetylglucosaminides. Mediates core 2 and core 4 O-glycan branching, 2 important steps in mucin-type biosynthesis. Has also I-branching enzyme activity by converting linear into branched poly-N-acetyllactosaminoglycans, leading to introduce the blood group I antigen during embryonic development.
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Huang M.-C., Oncogene 25:3267-3276(2006).
Tan S., Am. J. Respir. Cell Mol. Biol. 36:737-745(2007).