Glycosaminoglycans or mucopolysaccharides are long unbranched polysaccharides consisting of a repeating disaccharide unit.
Glycosaminoglycans form a part of connective tissues. Heparin as an anticoagulant, hyaluronan is a component in the synovial fluid and chondroitins are found in cartilage and tendon.
Chondrotoin sulphate is most prevalent glycosaminoglycan.
Chondrotoin has been used in osteoarthritis.