Gene expression of ERSR genes by BMI group. Gene expression, calculated as real-time values normalized to 18S RNA, is shown by BMI divided into lean (BMI < 25 kg/m2; n = 21, black bars), overweight (25–30 kg/m2; n = 29, white bars), or obese (BMI > 30 kg/m2, n = 28, hatched bars). Significant differences based on ANOVA of logarithmically-transformed values are marked by asterisks; no asterisks represent no significant difference. Other levels of significance are as follows: *, <0.01; **, P < 0.001; ***, P < 0.0001; ****, P < 0.00001. The graph is shown on a linear scale.