Fig. 5

Overall enrichment of tissue free ¹³C₆-Phe (a) and ¹³C₆-Tyr (b) by MSI (blue) and LC-MS (orange), and ¹³C₆-Phe protein enrichments (c) in homogenized tumor tissues by GC-C-IRMS. Enrichment is shown as mean MPE ± SE (%)