analysis of the distribution pattern of incorporated label into various glycosaminoglycan types ( hyaluronic acid , chondroitin sulfate , dermatan sulfate and possibly heparan sulfate ) revealed an age-related relatively stonger decline of 14c-glucosamine incorporation into cellular and extracellular hyaluronic acid and of 35s-sulfate into extracellular chondroitin sulfate in comparison with the other glycosaminoglycan types .
C0019143
heparan sulfate
C0017973
glycosaminoglycan