Metabolites detected by GC/MS in different preparations of mouse kidney–comparison between different types of tissue preparations.

Shown are differences (fold-changes) in relative abundances of each metabolite between FFPE or formalin-fixed (FF) tissue specimens and fresh-frozen (FrFr) reference tissue, followed by statistical significance of the difference (p-value estimated by the t-test). Tissue specimens were fixed with formalin for 24h. Metabolites not detected (n.d.) in FFPE, FF or FrFr specimens are marked with a, b and c, respectively.Metabolites detected by GC/MS in different preparations of mouse kidney–comparison between different types of tissue preparations.