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We designed a novel procedure for the isolation of mutant strains with significantly increased life spans in the nematode Caenorhabditis elegans. This procedure involves using heat-shock to screen a large number of animals and isolate a few which are more resistant to heat-shock stress. From the heat-shock-resistant animals, three mutant strains, HG25, HG96, and HG246, all exhibiting increased life...
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