the synthesis of collagen and proteoglycans by cultured chondrocytes , as measured by the incorporation of l- [ 3h ] proline into hydroxyproline and [ 3h ] acetate into glycosaminoglycans , was shown to be depressed by 58 % and 39 % , respectively , by the addition of exogenous proteoglycan at a concentration of 10 mg/ml growth media .
C0033382
proline
C0020388
hydroxyproline