D-Ala-Lys-AMCA hydrochloride, a known substrate of proton-coupled oligopeptide transporter 1 (PEPT1), emits blue fluorescence and may be transported into Caco-2 cells and liver cancer cells.

Octadecyl Rhodamine B chloride, also known as RBOE, is a polarity-sensitive dye that is often used as a chromophore with other compounds to stain cell membranes and has applications in the assembly of organic molecules, in membrane structures and in the transfer of electron energy in the structural domains of proteins.

α-Synuclein (45-54) (human) trifluoroacetate salt