Sulfo-Cyanine 5.5 maleimide

Sulfo-Cyanine 5.5 dye is a water soluble far red to NIR emitting dye which is very hydrophilic due to the presence of four sulfo groups. Sulfo-Cyanine 5.5 derivatives exhibit high water solubility. The dye is a perfect choice for the labeling of sensitive proteins, nanoparticles, and highly hydrophylic biopolymers. This maleimide is a thiol reactive dye that selectively labels cysteine residues. Disulfide bonds of native proteins should be reduced with an appropriate reducing agent, such as TCEP, according to our recommended protocol.

Product form:Dark colored solid, Molecular formula:1139.43 kDa, Molecular weight:1139.43 kDa, Purity:95% (by ¹H NMR and HPLC-MS), Storage:Shipped at room temperature. Upon delivery, store in the dark at -20?C. Avoid prolonged exposure to light. Desiccate, Absorption maxima:673 nm, Extinction coefficient:235000 M^-1cm^-1, Emission maxima:691 nm, Cas number:2183440-58-4, 2183440-57-3, CF260:0.09, CF280:0.11, Mass spec shift:1024.2, Solubility:Good in water, DMSO, and DMF.

+25° C.