Cy5-PEG-NHS Ester

Cyanine 5-poly(ethylene glycol)-N-hydroxysuccinimide ester (Cy5-PEG-NHS) is a functional dye combining a Cy5 cyanine chromophore, a defined-length PEG spacer, and an N-hydroxysuccinimide ester conjugation terminus. The PEG spacer is available in discrete chain lengths with different degrees of polymerization. The NHS ester can form amide bonds with primary amines, enabling conjugation to amine-containing small molecules, peptides, proteins, or material surfaces. The PEG spacer separates the chromophore from the target attachment site. Chain length can be selected in relation to labeling position, local environment, and conjugate dispersion.

Customization available.