Reaction catalyzed by O-fucosylpeptide 3-beta-N-acetylglucosaminyltransferase (2.4.1.222)

	O-fucose residues on Jagged1 Notch ligand	+			=
	O-fucose residues on Jagged1 Notch ligand	+		UDP-GlcNAc	=		GlcNAc-beta1,3-fucitol-Jagged1 Notch