sentences:  In humans, the amino acid length of syndecan 1, 2, 3 and 4 is 310, 201, 346 and 198 respectively.Glycosaminoglycan chains, a member of the heparan sulfate group, are an important component of syndecan and are responsible for a diverse set of syndecan functions.The addition of glycosaminoglycans to syndecan is controlled by a series of post- translation events.