Figure 2: Plots from multivariate statistical analysis of meat digestion samples. | Scientific Reports

Figure 2: Plots from multivariate statistical analysis of meat digestion samples.

From: Untargeted metabolomics of colonic digests reveals kynurenine pathway metabolites, dityrosine and 3-dehydroxycarnitine as red versus white meat discriminating metabolites

Figure 2

(a,b) Score plots of the PCA-X model for the colonic meat digestion samples after 48 h of incubation in positive (+) and negative (−) ionization mode. The red, green, blue symbols represent the beef, chicken digestion and internal quality control (IQC) samples, respectively. (c,d) S-plots (OPLS model) for the colonic meat digestion samples after 48 h of incubation in positive (+) and negative (−) ionization mode, wherein each dot represents a metabolite. The metabolites situated in the left lower quadrant are specifically associated with the digestion of chicken and the ones in the right upper quadrant are specifically associated with the digestion of beef (=metabolites of interest). The metabolites marked in red were retained for further analysis.

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