using collagenase digestion as an assay for collagen in partially synchronized secondary cultures of chick embryo fibroblasts , we find that the rate of collagen synthesis remains at a constant fraction of overall protein synthesis ( 5 % ) regardless of the growth rate of the cells even when the rate of protein synthesis is accelerated 5-fold by adding serum and altering the ph of the culture medium .
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collagen
C0007595
of