Patent ID: 7972815

Claim:
A method for synthesizing a sugar chain which comprises the step of: introducing DNA or RNA into a cell, wherein said cell comprises an acceptor substrate selected from i) N-acetyllactosamine (Galβ1-4GlcNAc), Galβ1-3GlcNAc or lactose (Galβ1-4Glc), ii) an oligosaccharide having an N-acetyllactosamine, Galβ1-3GlcNAc or lactose structure at the non-reducing end, and iii) a complex carbohydrate having an N-acetyllactosamine, Galβ1-3GlcNAc or lactose structure at the non-reducing terminal, wherein said DNA or RNA encodes a polypeptide selected from the group consisting of the following (a) and (b), and having β1,3-N-acetylglucosaminyltransferase activity: (a) a polypeptide comprising the amino acid sequence of SEQ ID NO:2; and (b) a polypeptide comprising the amino acid sequence of positions 45-372 of SEQ ID NO:2; and culturing the cell to express the polypeptide.