Gene expression and morphology of BAT are altered in Ames dwarf mice. A, iBAT weight relative to body weight (n = 10). B, iBAT thermogenic mRNA expression. C, iBAT lipid metabolism mRNA expression (n = 5 per group for panels B and C). D, Representative N iBAT H&E stain. E, Representative df/df iBAT H&E stain. *, P < .05; **, P < .01; #, P < .0001. df/df, homozygous; N, normal.