(g) Enhanced glucose tolerance of Atg5 Tg mice. WT and Atg5 Tg mice were starved overnight and then given with an i.p injection of glucose (1 mg g−1 body weight). The results are the mean±s.d. of 12-week-old WT and Atg5 Tg mice (n=12). *P0.01, **P0.001, ***P0.0001 versus control; Student's t-test. 