Cy3-PEG-SH (MW 1000)

Cy3-PEG-SH (MW 1000) is a thiol-reactive fluorescent probe used for labeling biomolecules in vitro and in vivo. Its maleimide-reactive thiol group forms stable conjugates, while the PEG spacer enhances solubility and reduces non-specific binding in applications like fluorescence imaging and biomolecular tracking.