The invention relates to a composition comprising a glycoprotein comprising the Fc domain of an antibody, or a fragment thereof, comprising an Asn (asparagine) residue and an oligosaccharide structure attached thereto, wherein said oligosaccharide structure has a structure according to formula I and wherein at least 20% of the oligosaccharide structures attached to glycoprotein in the composition consist of oligosaccharide structures according to formula (I).
