Cy7, SE is widely used in biomedical research for labeling biomolecules such as proteins, peptides, antibodies, and nucleic acids. Its near-infrared fluorescence properties make it ideal for in vivo imaging, allowing deep tissue penetration and minimal background interference. This dye is particularly valuable in tracking cellular processes, tumor targeting, and monitoring drug delivery systems. It is also employed in fluorescence microscopy and flow cytometry for sensitive detection and analysis. Additionally, Cy7, SE is used in the development of diagnostic assays and biosensors due to its high stability and brightness.