Suggested Reaction 2.4.1.-

Left

beta-D-Galactosyl-1,4-N-acetyl-D-glucosaminyl-R
+UDPgalactose

Right

alpha-D-Galactosyl-1,3-beta-D-galactosyl-1,4-N-acetyl-D- glucosaminyl-R
+UDP

[BiSSCat | GREP ]