Table 1.

Different amino acid modified formations and their inhibition of the uptake of L-[H³] leucine by L-type amino acid transporter 1

Doxorubicin	Amino acid	X	IC50
	Leu-		>100 μM
	Val-		>100 μM
	Asp-		30.12 μM
	Met-		>100 μM
	Phe-		>100 μM
	Ile-		>100 μM
	Tyr-		>100 μM