Cy3 and Cy5 monofunctional maleimides are particularly suitable for the selective labeling of molecules containing free sulfhydryl groups, such as cysteine residues in proteins and peptides and oligonucleotides.

• Particularly effective for labeling antibodies
• Large range of bulk packs available for maximum convenience and economy
• Example protocols included with each dye pack

Also useful in antibody labeling since the dye molecules are introduced away from the antibody binding site, increasing the chance that functionality of the labeled molecule will be unimpaired.