Transfers glucosyl residues to the D-galactosyl-D-glucosyl side-chains in the partially completed core of lipopolysaccharides. cf.EC 126.96.36.199 (lipopolysaccharide 3-α-galactosyltransferase), EC 188.8.131.52 (lipopolysaccharide N-acetylglucosaminyltransferase) and EC 184.108.40.206 (lipopolysaccharide glucosyltransferase I).
Edstrom, R.D. and Heath, E.C. The biosynthesis of cell wall lipopolysaccharide in Escherichia coli. VI. Enzymatic transfer of galactose, glucose, N-acetylglucosamine, and colitose into the polymer. J. Biol. Chem.242 (1967) 3581–3588. [PMID: 5341482]