Patent ID: 8829276

Claim:
A method of producing a transgenic plant system which is capable of adding galactose residues in β1,4-linkage to N-linked glycans, comprising: (a) inserting a nucleic acid molecule that encodes a non-mammalian β1,4-galactosyltransferase comprising an amino acid sequence identical to the active domain of SEQ ID NO:2 into a plant system, which is a whole plant, a part thereof, or a plant cell; wherein the active domain comprises amino acids 40-362 of SEQ ID NO:2, and wherein the galactosyltransferase further comprises a golgi localization signal sequence; and (b) selecting a transgenic plant system that has taken up the nucleic acid molecule of (a) and expresses the nucleic acid molecule, thereby producing a transgenic plant system capable of adding galactose residues in β1,4-linkage to N-linked glycans.