Figure 1From: Bench-to-bedside review: The role of glycosaminoglycans in respiratory diseaseSchematic structure of glycosaminoglycan and proteoglycan. Note that the hyaluronic acid is not linked to a protein core. Heparan sulphate, dermatan sulphate and chondroitin sulphate are connected to proteoglycan via a serine residue.Back to article page