since the total collagen content ( microgram hydroxyproline/mg cartilage ) , hydroxy- [ 14c ] proline/mg cartilage , specific radioactivity of hydroxyproline in the extractable collagen fraction were similar for normal and degenerative cartilage we propose that procollagen accumulated in the degenerative cartilage due to a partial defect in conversion of procollagen to collagen .
C0033382
proline
C0020388
hydroxyproline