Figure 5.

PCA results for the ¹H NMR spectra of strain pnit-6_1.5 cultured on Gln (samples 1–6; blue) and nitrate (samples 7–12; red). (A) PCA scores. Although the samples within a treatment are not tightly clustered, clear segregation of the samples by treatments is observed in the scores plot. (B) PCA loadings. The loadings plot highlights the ¹H NMR resonances that make the greatest contributions to sample variance in this data set. The loadings for PC1 are shown in blue, and those for PC2 are shown in green.