Fig. 1.

Body weight of mice fed a high-fat diet (HFD) for 1 week. Male heterozygous PER2::LUC mice were single-housed at 7 weeks old and provided with chow ad libitum until 8 weeks old. At 8 weeks old, mice were provided with fresh chow (gray symbols and dotted gray lines; n=7) or a HFD (black symbols and solid black lines; n=7). Body weights, measured at 7, 8, and 9 weeks old, from all individual mice are shown.