Fig. 3: Multivariate statistics reveals a species-specific amino acids plasma profile.
From: Plasma methionine metabolic profile is associated with longevity in mammals

a Principal component analyses (PCA) representation of amino acids. X: Principal component 1 (PC1); Y: Principal component 2 (PC2); Z: Principal component 3 (PC3). b Hierarchical clustering of individual animal samples according to metabolite abundance. c RF classification algorithm. d VIP scores for RF. Data values are obtained from four (mice and cows), five (rats, rabbits, guinea pigs, sheep, dogs, pigs, cats and horses) or six (humans) specimens.