the data presented are consistent with the hypothesis that a proteolytic mechanism utilizing some combination of cysteine , serine , and aspartic proteinases is necessary for continued collagen synthesis in freshly isolated embryonic chick tendon fibroblasts , and suggests that a heretofore unknown regulatory system may be operative in controlling the synthesis of collagen in fibroblasts .
C0597304
proteolytic
C2717969
aspartic proteinases