D-Ala-Lys-AMCA TFA is a proton-coupled oligopeptide transporter 1 (PEPT1) substrate characterized by its emission of blue fluorescence. It has been demonstrated through fluorescence analysis that this compound can be transported into liver cancer cells and Caco-2 cells. Its utility extends to the characterization of PEPT1-specific substrates or inhibitors [1] [2].

D-Ala-Lys-AMCA（25、50及150 μM浓度，作用3小时）通过TFA成功转运至肝癌细胞和Caco-2细胞中[1]。