FXR deficiency differentially affects the abundance of long-chain, unsaturated triglyceride (TG) species in adipose tissue of lean and obese mice. Lipidomic analysis was performed in white adipose tissue of 6-week-old FXR+/+ob/ob, FXR−/−ob/ob mice, as well as lean FXR+/+ and FXR−/− littermates (lean FXR+/+, white bars or squares; lean FXR−/−, black bars or squares; obese FXR+/+, white bars or circles; obese FXR−/−, black bars or circles). Representative data for A–C: Medium-chain triglycerides with a high saturation level. D–F: Long-chain, highly unsaturated triglycerides. G–I: Long-chain triglycerides containing few double-bounds. J: PLS/DA of all measured lipid species. Values are means ± SEM. Differences between genotypes were calculated by one-way ANOVA and Student t test. *Compares the effect of leptin-deficiency; $compares the effect of FXR deficiency (* or $P < 0.05, ** or $$P < 0.01, or $$$P <0.001).