, 1997; Yamanaka et?al., 2003). In contrast, dKO mice were less active after fasting, and endurance performance was?reduced by 8.3-fold; none performed better than before #links# fasting ( Figures 7H and 7I). Two days after reintroduction of food, dKO mice regained endurance and became as active as before fasting ( Figure?7I). In the less strength-demanding rotarod test, the mutants�� performances


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