CaMKIIβ KO mice have a developmental delay in body weight.

<p>(<b>A</b>) CaMKIIβ^+/+ and CaMKIIβ^−/− mice were weighed at birth, or starting at weaning (3 weeks old) until 4 months of age. n = 5–13/time point. (<b>B</b>) Echo MRI was used to determine lean/fat mass in 12 week old mice. No genotype effect was seen in the amount of water (<b>C</b>) or in the amount of food (<b>D</b>) consumed, or in respiratory exchange ratio (<b>E</b>). *p<0.05, **p<0.01. Data are presented as means ±SEM. n = 4–6 per group in panels B–E.