5(6)-TAMRA, SE is widely used as a fluorescent labeling reagent in biological and chemical research. It is particularly effective for labeling proteins, peptides, and nucleic acids due to its bright fluorescence and high stability. The succinimidyl ester group allows for efficient conjugation with primary amines, making it a popular choice for creating fluorescent probes for imaging and detection. In fluorescence microscopy, it is used to visualize and track biomolecules in live cells or fixed tissues. Additionally, it is employed in flow cytometry and fluorescence-based assays to study molecular interactions and cellular processes. Its mixed isomers ensure versatility in labeling applications, providing consistent and reliable results across various experimental setups.