Linear Discriminant Analysis (LDA) data transformation and classifier found that the combination of five mitochondrial proteins (carnitine palmitoyltransferase 1, CPT1; hydroxyl-CoA dehydrogenase subunit α, HADHA; heat shock protein 60, HSP60; superoxide dismutase 2, SOD2 and thioredoxin, TRX) plus the cytoplasmatic fatty acid synthase (FAS), correctly classified 93% of the samples (Fig. 1b), allowing discrimination of tumor from NAT with high sensitivity and specificity as revealed in the Receiver Operating Characteristic (ROC) curve (Fig. 1c). The gene discussed is FAS; the disease is neoplasm.