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Four alleles of eat-2 lengthen life span. The percentage of worms alive on a given day after eggs being laid for a single experiment: N2 (□), eat-2(ad465) (○), eat-2(ad453) (■), eat-2(ad1113) (▵), and eat-2(ad1116) (•). Mean life spans are given in Table 1. The death of the last surviving eat-2(ad1116) worm is not shown. This worm died on day 86.
