Cy5.5-PEG-SH (MW 3400)

Cy5.5-PEG-SH (MW 3400) is a thiol-reactive fluorescent dye conjugate used for labeling biomolecules via stable thioether linkages, particularly with maleimide groups. Its near-infrared emission is valuable for in vivo imaging and in vitro assays, facilitating tracking in biodistribution and molecular interaction studies.