Oligosaccharide structures play a key role in the antigenicity of a number of clinically important antigens such as blood group determinants. Interest in glycobiology has increased dramatically amongst immunologists during the last few years due to the fact that oligosaccharides also play a central role in adhesion and homing events during inflammatory processes (1), comprise powerful xenotransplantation antigens (2), and may provide targets for tumor immunotherapy (3). Additionally, alterations in glycosylation are now known to occur in a number of autoimmune diseases. This review will first discuss some general aspects of protein glycosylation and then explore some of the autoimmune diseases in which the role of glycosylation has been examined.
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