Invitrogen Cy3 dye is a bright, orange-fluorescent dye that can be excited using the 532 nm laser line and visualized with TRITC (tetramethylrhodamine) filter sets. In addition to immunocytochemistry applications, Cy3 dye is commonly used to label nucleic acids.
The Cy3 fluorophore is also the basis for the lipophilic neuronal and long-term DiI cell tracing reagents, which append alkyl tails (≥12 carbons) onto the core fluorophore.
Invitrogen Alexa Fluor 555 dye is a Cy3 dye alternative that is generally more fluorescent and more photostable than Cy3 dye, making it well suited for applications such as imaging and flow cytometry.
Cy3 dye dashboard
|The Cy3 dye is a traditional orange-fluorescent label for protein and nucleic acid conjugates used for imaging, flow cytometry, and genomic applications. It is also the basis for the classic lipophilic tracer DiI and its variants.|
Photostability in buffer
Photostability in antifade
We offer a range of Cy3 dye and DiI products including secondary antibodies, streptavidin conjugates, kits, and more. Learn more here:
- Streptavidin conjugates for signal amplification
- Neuronal tracers
- Cell tracers
- Nucleic acid labeling
- RNA amplification kits
Learn more about fluorescent dyes in the Cy3 dye wavelength range
High-performance alternatives to Cy3 dye
The Alexa Fluor 555 dye—with nearly identical spectral properties to Cy3 dye—produces brighter, more photostable conjugates. These conjugates are ideal for imaging and other applications requiring increased sensitivity and environmentally insensitive fluorescence detection.
We offer Alexa Fluor 555 dye conjugated to a variety of antibodies, peptides, proteins, tracers, and amplification substrates optimized for cellular labeling and detection. In addition, reactive dye forms and protein labeling kits are available to allow you to generate your own antibody conjugates or probes.
Learn more about Alexa Fluor 555 dye
5 steps resources
Not for resale. Super Bright Polymer Dyes are sold under license from Becton, Dickinson and Company.
For Research Use Only. Not for use in diagnostic procedures.