SLC7A5 and cancer: Nevertheless, JPH203 prominently suppressed the transport of LAT1 substrates in the tested four cancer cell lines: the uptake of L‐[14C] Leu was reduced by 73, 78, 76 and 73%, and that of L‐[14C] Phe was reduced by 81%, 85%, 82% and 59% in HPAC, MIA PaCa‐2, PANC‐1 and SUIT‐2 cells, respectively.