Red Fluorescent Protein (RFP)

Red fluorescent protein (RFP) is a versatile biological marker for monitoring physiological processes, visualizing protein localization, and detecting transgenic expression in vivo. RFP can be excited by the 488 nm or 532 nm laser line and is optimally detected at 588 nm.

We offer a series of Invitrogen CellLight RFP fusion constructs of signal peptides or cell structure proteins with tagRFP for accurate and specific targeting to subcellular structures, including the cytoskeleton, mitochondria, and secretory compartments.

To complement these tools, we also offer anti-RFP antibodies and antibody conjugates for a wide variety of applications, including imaging, western blotting, and flow cytometry. All of our anti-RFP antibodies are suited for detection of native RFP, RFP variants, and CellLight fusion proteins.

RFP dashboard

Initial brightness

RFP is a useful expression label for flow cytometry or imaging applications. Weak signals can be retrieved or amplified using an anti-RFP antibody.  

Photostability in buffer


Photostability in antifade


  488, 532 TRITC/RFP 555 584  
Laser line

Common filter set

Excitation max

Emission max

RFP products

CellLight reagents

Invitrogen CellLight reagents are ready-to-use fluorescent protein constructs targeted to specific subcellular structures. These reagents provide a simple and effective method for introducing targeted intracellular labels within living cells. Simply add the reagent to your cells, incubate overnight, and you’re ready to image your cells.

Learn more about CellLight reagents

Anti-RFP antibodies

Anti-RFP antibodies provide a convenient method for visualizing RFP, especially when amplification of the fluorescent protein of interest is necessary to overcome a dim or degraded signal. Our anti-RFP antibodies are easily incorporated into standard immunostaining protocols for cell and tissue analysis.

Anti-RFP primary antibodies

Specificity of anti-RFP rabbit polyclonal antibody in immunocytochemistry (ICC)

Specificity of anti-RFP rabbit polyclonal antibody in immunocytochemistry (ICC). Following fixation and permeabilization, HeLa cells were stained with Invitrogen Alexa Fluor 350 phalloidin and anti-RFP rabbit polyclonal antibody, the latter subsequently visualized with Invitrogen Alexa Fluor 647 Goat Anti-Rabbit IgG antibody, red fluorescence and imaged. No cross-reactivity is observed of the anti-RFP antibody with GFP (green-fluorescence, perinuclear region).

BacMam technology

  • Efficient transduction of cell lines, including primary cells and stem cells
  • Safe transduction and lack of observable cytopathic effects
  • Easy modulation of gene expression
  • Expression of multi-component complexes at the right stoichiometry

The Invitrogen BacMam technology is based on double-stranded DNA insect viruses (baculovirus) as vehicles to efficiently deliver and express genes in mammalian cells, including those encoding fluorescent proteins, such as RFP. Baculoviruses are well-tolerated and nonreplicating in mammalian cells, so they have an excellent safety profile for routine applications.

Learn more about:

Live-cell imaging of HeLa cells

Live-cell imaging of HeLa cells using CellLight mitochondria and talin probes, transduced using BacMam 2.0 technology.


Molecular Probes Handbook

Cell stain tool

The significantly revised 11th Edition is the most complete fluorescence labeling and detection reference available. The Molecular Probes Handbook can help you achieve the best experimental results for your fluorescence labeling and detection experiments. View the handbook online or order your own copy.

Go to the Handbook online
Order your copy of the Handbook

Antifade reagents

Cell stain tool

Antifade reagents suppress photobleaching and preserve the signals of your fluorescently labeled target molecules. They offer excellent compatibility with a multitude of dyes across the spectrum, making them especially valuable tools for multicolor applications. For added convenience, some formulations include the nuclear counterstain DAPI, eliminating the need for a separate counterstaining step.

Learn more about SlowFade Antifade reagents
Learn more about ProLong Antifade reagents

Cell stain tool

Cell stain tool

Stain your own cell by using our simulation tool to develop reproducible results with many of our signature fluorescent dyes. Develop your multiplexing strategy for antibody probes, reactive dyes, and counterstains to create your perfectly labeled fluorescent cell.

Go to the cell stain tool

Fluorescence SpectraViewer


Plot and compare spectra and check the spectral compatibility for common fluorophores including all of the fluorescent probes from Thermo Fisher Scientific. The Fluorescence SpectraViewer tool is formatted for both microscope imaging and flow cytometry applications.

Go to the Fluorescence SpectraViewer

Not for resale. Super Bright Polymer Dyes are sold under license from Becton, Dickinson and Company.