Fig. 2

Acyl-carnitine, phosphatidylcholine (PC) and sphingomyelin (SM), and phosphatidylinositol lipid profiles in peri-gonadal adipose tissue show differences with reproductive age. 2D Principal component analysis (PCA) plots that show the separation of (a) Acyl-carnitines, (b) phosphatidylcholines (PC) and sphingomyelins (SM), and (c) phosphatidylinositols in peri-gonadal adipose tissue between reproductively young (green) and old (red) mice. Heatmaps representing color-coded profiling of the 25 most abundant (d) acyl-carnitine, (e) phosphatidylcholine and sphingomyelin, and (f) phosphatidylinositol lipid species in peri-gonadal adipose tissue from reproductively young (green) and old (red) mice. The top 25 lipid species corresponding to the numbers in the heatmaps are listed in Table 1