A macromolecule found on the surface of eukaryotic cells which is thought to play a role in the cell's recognition of other cells or of a substrate. It consists of a network of long, branched chains made up of repeating units of disaccharides which contain amino groups. A protein component of the capsid of a retrovirus which can act as group-specific antigens to the host.
Selected glycosaminoglycan links:
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