the information obtained in a prospective study of plasma concentrations of connective tissue components during the third trimester of pregnancy , 4 days , and again at 6 weeks postpartum , suggests that the increased concentrations of plasma protein-hydroxyproline ( hypro-protein ) , free proline , and gag are associated with increased rate of hydrolysis of extraskeletal connective tissue components .
C0020388
hydroxyproline
C0033382
proline