a, Regression plot of energy expenditure (EE) measured in HFD-fed Ralaf/f and RalaAKO mice (n = 5–8) during dark phase. ANCOVA test was performed using body weight (BW) as a covariate, group effect p = 0.0391. b, c, Immunoblot (b) and quantification (c) of OXPHOS proteins in iWAT of HFD mice (n = 10–13). d, e, Plasma non-esterified fatty acid (NEFA, d) and TG (e) levels in HFD-fed Ralaf/f and RalaAKO mice (n = 10–13). f, Basal oxygen consumption rate (OCR) in mitochondria measured by Seahorse. Mitochondrial fractions were isolated from primary mature adipocytes in iWAT or eWAT of HFD-fed Ralaf/f and RalaAKO mice (n = 4–5). The data (c-f) are shown as the mean ± SEM, *p < 0.05, **p < 0.01,***p < 0.001 by unpaired t-test (c-f).