Cyanine5 NHS ester bromide 

Cyanine5 NHS ester bromide is a active compound, can be used to label amino groups in peptides, proteins, and oligonucleotides. Cyanine5 NHS ester bromide is a cyanine dye, fluorescence-labeling neurotensin (8-13) via arginine residues^[1].

Cyanine5 NHS ester bromide can be excitable with a red (635 nm) and a 488 nm argon laser, respectively^[1].
Cyanine5 NHS ester bromide applys for characterization^[1]:
1. Acquire high resolution mass spectra (HRMS) with Agilent 6540 UHD Accurate-Mass QTOF LC/MS system coupled to an Agilent 1290 HPLC system, using an ESI source.
2. Perform preparative HPLC with a system from Knauer (Berlin, Germany). A Kinetex-XB C18, 5 μm, 250 × 21 mm (Phenomenex, Aschaffenburg, Germany) is used as stationary phase. Mixtures of 0.1% aq TFA and acetonitrile are used as mobile phase. The flow rate is 18-20 mL/min, and a detection wavelength of 220 nm is used throughout.
3. Analysis HPLC with a system from Agilent Technologies. A Kinetex-XB C18, 2.6 μm, 100 × 3 mm (Phenomenex) serves as stationary phase at a flow rate of 0.5-0.6 mL/min. The oven temperature is set to 25 °C. Mixtures of 0.04% aq TFA and acetonitrile are used as mobile phase. The injection volume is 20 μL. Detection is performed at 220 nm.

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

660.64

C₃₆H₄₂BrN₃O₄

1653991-59-3

660

640

Room temperature in continental US; may vary elsewhere.

Please store the product under the recommended conditions in the Certificate of Analysis.

• [1]. Keller M, et al. Fluorescence Labeling of Neurotensin(8-13) via Arginine Residues Gives Molecular Tools with High Receptor Affinity. ACS Med Chem Lett. 2019 Nov 19;11(1):16-22.  [Content Brief]