Cyanine 5 maleimide (A270168)

Cyanine 5 maleimide

Cyanine 5 maleimide is a mono-reactive dye which selectively couples with thiol groups (for example, with cysteines in peptides and proteins) to give labeled conjugates. Cyanine 5 is an analog of Cy5®, a common fluorophore which is compatible with various instrumentation like microscopes, imagers, and fluorescence readers. For the labeling of antibodies and sensitive proteins we recommend to use the water soluble sulfo-Cyanine 5 maleimide.

646 nm

250000 M^-1cm^-1

662 nm

0.2

1437872-46-2, 1437796-65-0

0.04

95% (by ¹H NMR and HPLC-MS).

C₃₈H₄₅ClN₄O₃

641.24 kDa

Dark blue powder.

Soluble in organic solvents (DMF, DMSO, dichloromethane). Practically insoluble in water (31 uM, 23 mg/L).

Shipped at room temperature. Upon delivery, store in the dark at -20°C. Avoid prolonged exposure to light. Desiccate.

This product is for research use only. It is not intended for diagnostic or therapeutic use.