Cy5.5 (Sulfo-Cyanine5.5) is a near-infrared fluorescent dye (Ex=673 nm, Em=707 nm) used to label biological molecules, such as peptides, proteins, and oligonucleotides[1].
The carboxyl group of this product is in an unactivated state. It is recommended to activate it with 500μg/mL condensation solution (Item number: GA11126) before proceeding with subsequent labeling experiments.
[1]. Zhu S, et al. Visualizing cancer and response to therapy in vivo using Cy5.5-labeled factor VIIa and anti-tissue factor antibody. J Drug Target. 2015 Apr;23(3):257-65. [2]. Jiang L, et al. pH/temperature sensitive magnetic nanogels conjugated with Cy5.5-labled lactoferrin for MR and fluorescence imaging of glioma in rats. Biomaterials. 2013 Oct;34(30):7418-28. [3]. Lim B, et al. A Unique Recombinant Fluoroprobe Targeting Activated Platelets Allows In Vivo Detection of Arterial Thrombosis and Pulmonary Embolism Using a Novel Three-Dimensional Fluorescence Emission Computed Tomography (FLECT) Technology. Theranostics. 2017 Feb 26;7(5):1047-1061.