Metabolic diversity of the examined cell lines. The PCA score plots demonstrate distinct clustering of HCT15 (dark blue), HCT116 (light blue), OVCAR3 (red), and SKOV3 (orange). Clear separation of cell lines was observed. The number of dots corresponds to the number of replicates. Data was analyzed using the metaP server  and can be accessed interactively at http://metap.helmholtz-muenchen.de/metap3/run.cgi?ID=141536220398464.