To further validate our results concerning LAT1 mRNA expression, we ran parallel Western blot experiments to test LAT1 protein expression in normal/tumoral samples: we demonstrated a positive trend between mRNA levels and protein expression, confirming that the difference in LAT1 expression between PHEO/MTC and their normal counterparts emerges at protein level too. The gene discussed is LAT; the disease is medullary thyroid gland carcinoma.