Figure 2.

The projection to latent structures and discriminant analysis score plot. (a) SN, normal serum; SP, patient serum. The two groups of serum were completely scattered into two different regions. There were two samples on the outside of the oval, which were far away from the others. It indicated that the metabolic profilings of the two people were significantly different from others, and we had eliminated the two samples when performing two sample t-tests. (b) TC, tumor-adjacent tissue; TP, cancer tissue.