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The principal component analysis (PCA) scores plot and the corresponding PCA loadings plot of the multivariate statistical analysis of the metabolome of the Escherichia coli (E. coli) strains EcN, 83972, and CFT073 cultivated in minimum essential medium (MEM) for 6 h and the blank sample treated under the same conditions. Three biological replicates of each strain were analyzed in triplicate. The labeled numbers of the red marked area correspond to the features of Table 1.
