Cy3-PEG-SH (MW 5000)

Cy3-PEG-SH (MW 5000) is a thiol-reactive fluorescent probe for labeling biomolecules via stable thioether linkages, commonly with maleimide groups. Its PEG spacer enhances solubility and reduces non-specific binding, making it suitable for in vitro assays and in vivo imaging studies in fields like cell biology and bioconjugation.