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Caloric restriction has been demonstrated to extend life span and postpone aging in a variety of species. The recent extension of the caloric restriction paradigm to yeast places the emphasis of the search for the longevity effectors at the cellular level. To narrow the range of potential effectors of the caloric restriction response, we have examined the effects of the histone deacetylases Rpd3p,...
Deficiencies in superoxide dismutases (Cu,Zn-SOD or Mn-SOD) strongly shorten the life span of yeast cells. The effects of these deficiencies are additive. In contrast, deficiencies in catalases do not influence life span. Our results confirm that free radical processes may be involved in aging.
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