Cy3 Picolyl Azide
Abs/Em Maxima: 555/572nm
Extinction Coefficient: 150,000
Flow Cytometry Laser Line: 532 or 555 nm
Microscopy Laser Line: 532 or 555 nm
Spectrally Similar Dyes: Alexa Fluor? 555, Atto? 555, CF? 555 Dye, DyLight?549, Cy3 Dye
Cy3 Picolyl Azide is an advanced fluorescent probe that incorporates a copper-chelating motif to raise the effective concentration of Cu(I) at the reaction site to boost the efficiency of the CuAAC reaction, resulting in a faster and more biocompatible CuAAC labeling. Up to 40-fold increase of signal intensity, compared to conventional azides, was reported (see Selected References).
In addition, the use picolyl azides instead of conventional azides allows for at least a tenfold reduction in the concentration of the copper catalyst without sacrificing the efficiency of labeling, significantly improving biocompatibility of CuAAC labeling protocol.
In summary, the introduction of a copper-chelating motif into azide probe leads to a substantial increase in the sensitivity and reduced cell toxicity of CuAAC detection alkyne-tagged biomolecules. This will be of special value for the detection of low abundance targets or living system imaging.
Cy3 Picolyl Azide is a water-soluble, bright orange-fluorescent dye with excitation ideally suited for the 532 nm or 555 nm laser lines and visualized with TRITC (tetramethylrhodamine) filter sets. Cy3 dye is structurally similar, and spectrally is almost identical to Alexa Fluor? 555, CF? 555 Dye, or any other Cyanine3 based fluorescent dyes.
1. Couradeau, E., et al. (2019). Probing the active fraction of soil microbiomes using BONCAT-FACS Nat Commun, 10, 2770-80. [PubMed]
2. Jiang, H., et al. (2014). Monitoring Dynamic Glycosylation in Vivo Using Supersensitive Click Chemistry. Bioconjugate Chem.,, 25, 698-706. [PubMed]
3. Uttamapinant, C., et al. (2012). Fast, Cell-Compatible Click Chemistry with Copper-Chelating Azides for Biomolecular Labeling. Angew. Chem. Int. Ed,., 51, 5852-56. [PubMed]
4. Gaebler, A.,et al. (2016). A highly sensitive protocol for microscopy of alkyne lipids and fluorescently tagged or immunostained proteins. J. Lipid. Res., 57, 1934-47. [PubMed]
Abs/Em Maxima: 346/445 nmExtinction Coefficient: 19,000Spectrally Similar Dyes: Alexa Fluor? 350, CF? 350, DyLight 350, AMCAAZDye? 350 is a blue-fluorescent azide-activated probe that reacts with terminal alkynes via a copper-catalyzed click react…
Abs/Em Maxima: 402/424 nmExtinction Coefficient: 35,000Flow Cytometry Laser Line: 405 nmMicroscopy Laser Line: 405 nmSpectrally Similar Dyes: Alexa Fluor? 405, CF? 405, Cascade Blue?, DyLight? 405AZDye? 405 Azide is a water-soluble, pH-insensiti…
Abs/Em Maxima: 346/445 nmExtinction Coefficient: 19,000Spectrally Similar Dyes: Alexa Fluor? 350, CF? 350, DyLight 350, AMCAAZDye? 350 Alkyne (Alexa Fluor? 350 Alkyne equivalent) is a blue-fluorescent, alkyne-activated probe that reacts with azid…
Abs/Em Maxima: 430/537 nmExtinction Coefficient: 15,000Spectrally Similar Dyes: Alexa Fluor? 430, CF? 430AZDye? 430 Azide is a water-soluble, green-fluorescent azide-activated probe that reacts with terminal alkynes via a copper-catalyzed click re…
Abs/Em Maxima: 346/445 nmExtinction Coefficient: 19,000Spectrally Similar Dyes: Alexa Fluor? 350, CF? 350, DyLight 350, AMCAAZDye? 350 DBCO reacts with azides via a copper-free “click chemistry” reaction to form a stable triazole and does not re…
Abs/Em Maxima: 402/424 nmExtinction Coefficient: 35,000Flow Cytometry Laser Line: 405 nmMicroscopy Laser Line: 405 nmSpectrally Similar Dyes: Alexa Fluor? 405, CF? 405, Cascade Blue?, DyLight? 405AZDye? 405 Alkyne reacts with azides via a copper…
Abs/Em Maxima: 494/517 nmExtinction Coefficient: 73.000Flow Cytometry Laser Line: 488 nmMicroscopy Laser Line: 488 nmSpectrally Similar Dyes: Fluorescein, Alexa Fluor? 488, CF? 488A, DyLight? 488, Atto? 488AZDye? 488 Azide (Alexa Fluor? 488 Azi…
Abs/Em Maxima: 402/424 nmExtinction Coefficient: 35,000Flow Cytometry Laser Line: 405 nmMicroscopy Laser Line: 405 nmSpectrally Similar Dyes: Alexa Fluor? 405, CF? 405, Cascade Blue?, DyLight? 405ZDye? 405 DBCO reacts with azides via a copper-fr…
