title: Age-related changes in proteoglycan structure.
mesh_terms: D000367:Age Factors; D000596:Amino Acids / Q000032:analysis; D000818:Animals; D002358:Cartilage, Articular / Q000032:analysis*; D002417:Cattle; D055598:Chemical Phenomena; D002621:Chemistry; D002809:Chondroitin Sulfates / Q000032:analysis; D005688:Galactosamine / Q000032:analysis; D005944:Glucosamine / Q000032:analysis; D006025:Glycosaminoglycans; D007632:Keratan Sulfate / Q000032:analysis; D011509:Proteoglycans / Q000032:analysis
chemical_list: D000596:Amino Acids; D006025:Glycosaminoglycans; D011509:Proteoglycans; D005688:Galactosamine; D002809:Chondroitin Sulfates; D007632:Keratan Sulfate; D005944:Glucosamine