This chapter presents an overview of the current understanding of how yeast ages and the genes and pathways that play a role in determining yeast chronological and replicative life span. Several genes, as well as calorie restriction, have been found to regulate aging similarly in yeast and multicellular eukaryotes, and these potentially conserved determinants of longevity are emphasized. Descriptions of the chronological and replicative life span assay are provided in enough detail to allow a researcher with common knowledge of yeast methods to carry out his or her own aging studies.
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When over eighty years of age, the poet Bryant said that he had added more than ten years to his life by taking a simple exercise while dressing in the morning. Those who knew Bryant and the facts of his life never doubted the truth of this statement.