The growth of young rats was arrested for 6 weeks from 48 h after receiving an injection of L-[5-3H]proline. The 3H in the hydroxyproline of the newly synthesized skin collagen remained steady during under-nutrition and did not decrease during the subsequent recovery period. It was concluded that in this animal model the renewed growth did not induce degradation of the pre-existing collagen fibres.
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David J. Etherington (1977) studied this question.
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