an increase in collagen synthesis by hepatic parenchymal cells ( hepatocytes ) was observed during 8 days in primary culture by the quantification of total [ 3h ] hydroxyproline as a marker of total collagen synthesis and the ratio of [ 3h ] hydroxyproline in the high-molecular-weight fraction to total [ 3h ] hydroxyproline as a marker of collagen degradation after incubation of the cells with [ 3h ] proline for 24 h .
C0020388
hydroxyproline
C0033382
proline