5-FAM cadaverine is widely used in biochemical and cellular research as a fluorescent probe. Its primary application is in labeling and tracking biomolecules, such as proteins, peptides, or lipids, due to its strong fluorescence properties. Researchers utilize it to study molecular interactions, cellular uptake, and intracellular trafficking in live cells or fixed samples. It is also employed in fluorescence microscopy and flow cytometry to visualize and quantify specific biological processes. Additionally, 5-FAM cadaverine is used in enzyme activity assays, particularly for transglutaminases, where it acts as a substrate to monitor enzymatic activity. Its versatility makes it a valuable tool in diagnostics, drug discovery, and understanding cellular mechanisms.