Dietary protein, life-span, and biochemical variables in female mice.

@article{Leto1976DietaryPL,
  title={Dietary protein, life-span, and biochemical variables in female mice.},
  author={S Leto and Gertrude C. Kokkonen and C H Barrows},
  journal={Journal of gerontology},
  year={1976},
  volume={31 2},
  pages={144-8}
}
The 50% mortality of female C57BL/6J mice fed ad libitum a diet which contained 26% or 4% casein, was 23.5 and 28 mo., respectively. Diet did not markedly affect the age-associated changes in the collagen content of the extractability of collagen of skin. In general, the activities of enzymes based on DNA were low in the restricted animals. 

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