Cy5.5-PEG-SH (MW 3400)

Cy5.5-PEG-SH (MW 3400) is a fluorescent labeling reagent consisting of the Cy5.5 fluorescent dye, polyethylene glycol (PEG), and a thiol (SH) group, making it suitable for molecular conjugation. The SH group is highly reactive, allowing it to form stable thioether bonds with various functional groups, such as maleimide.