Leto S, Kokkonen G C, Barrows C H
J Gerontol. 1976 Mar;31(2):144-8. doi: 10.1093/geronj/31.2.144.
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.
随意喂食含26%或4%酪蛋白饮食的雌性C57BL/6J小鼠，其50%死亡率分别为23.5个月和28个月。饮食对皮肤胶原蛋白含量或胶原蛋白可提取性的年龄相关变化没有明显影响。一般来说，限食动物中基于DNA的酶活性较低。
