Cy5-PEG-SH (MW 5000)

Cy5-PEG-SH (MW 5000) is a fluorescent labeling reagent comprising Cy5 fluorophore, polyethylene glycol (PEG), and a thiol group (SH), designed for molecular conjugation. The SH group is highly reactive and can form stable thioether bonds by reacting with various functional groups, such as maleimide.