Energy balance and motor activity of 8 week-old WT and Nbea+/− mice, fed with standard chow ad libitum over 24 h (n = 8/group; mean±SD).

*Food intake, daily metabolized energy intake, oxygen consumption and daily energy expenditure were analyzed using a linear model including body mass as covariate accounting for the effects of body mass differences on energy metabolism parameters.**In-out difference was analyzed using a linear model including weight changes during the indirect calorimetry trial as covariate.