Fig. 1.

Effect of calorie restriction on body weight (A) and spleen weight (B). Mice were fed on either 95 kcal/week (green lines) or 65 kcal/week (red lines) diets from the age of 7-weeks and sacrificed at the ages of 7-weeks-old, 8-weeks-old and 100-days-old. Body weights and spleen weights were monitored at the time of sacrifice. Solid line: mice irradiated with 3.8 Gy X-rays; dotted line: unirradiated mice.