Fig. 3From: Changes of the liver metabolome following an intravenous lipopolysaccharide injection in Holstein cows supplemented with dietary carnitineEffect of LPS challenge on the hepatic metabolome profiles of Holstein cows without supplementary carnitine (CON group on d 112 postpartum). A, Hepatic metabolome profiles before and after LPS challenge by PLS-DA scores plot. B, Top 15 important hepatic metabolites in the first PLS-DA component. C, The accuracy, the goodness of fit (R2), and predictive ability (Q2) of the PLS-DA model as assessed by cross-validation. In plot B, the blue and red squares indicate lower and higher metabolite concentrations, respectively. Cx: Acylcarnitines of x chain length; PC: Phosphatidylcholine; SM: Sphingomyelin; lysoPC: Lysophosphatidylcholine. The specific abbreviations of these metabolites are available in Additional file 1: Table S1Back to article page