D-Ala-Lys-AMCA hydrochloride(Cat No.:I046085)is a synthetic fluorescently labeled dipeptide probe widely used in biochemical and cell biology research. It consists of D-alanine and lysine conjugated to 7-amino-4-methylcoumarin-3-acetic acid (AMCA), a blue-emitting fluorophore, forming a stable hydrochloride salt for improved solubility. This probe is commonly applied in enzyme activity assays, peptide uptake studies, and imaging of cellular processes. Its fluorescence properties allow sensitive detection and quantification in live or fixed cells, making D-Ala-Lys-AMCA hydrochloride a valuable tool for exploring peptide transport and protease activity.