Figure 2. Volcano plots of metabolome differences. (A) Interspecies comparison. (B) Comparison between young (1-1.5 months) and old (20 months) mice. (C) Comparison between young (1 year) and old (10 months) naked mole-rats (NMR). The color code classifying different metabolic species used in A is also used in B and C. Selected metabolites are indicated.