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CELT-327 | Fluorescent Receptor Probes
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Description: Potent and selective hA2B/A3 adenosine receptor fluorescent antagonist

Purity: ≥95%

Product Details

Biological Activity

CELT-327 is a potent and selective fluorescent hA2B/A3 adenosine receptor antagonist (Ki values are 35.6 nM and 45.7 nM at A2B and A3 receptors respectively). It shows dose-dependent membrane fluorescent labeling in HCT116 cells expressing A2B adenosine receptors, with rapid diffusion and homogeneous distribution of the fluorescence signal within the cell monolayer. In live HCT116 compact spheroids, CELT-327 displays homogeneous staining across the entire spheroid diameter, reaching deep spheroid regions. CELT-327 can be used as a fluorescent adenosine receptor probe for fluorescence binding assays, live cell imaging, flow cytometry, and fluorescence polarization assays. It is a suitable replacement for GPCR radiolabeling ligands. Excitation and emission maxima (λ) are 589 nm and 616 nm, respectively. Wavelengths are compatible with use as an acceptor dye in TR-FRET assays, together with the CoraFluor 1 (Cat. No. 7920) TR-FRET donor.

Add 75 μL of assay buffer containing 1% of DMSO to obtain a 100 μM stock solution, and use 250 nM as a working concentration.

Scientific Data

Live-cell Imaging Application of CELT-327 to live colorectal cancer cells View Larger

Application of CELT-327 to live colorectal cancer cells. HeLa cells were co-cultured with fibroblasts from the stroma around tumors (CAFs) previously labeled in green with a cell-tracker. Both cell types were incubated with CELT-327 (250 nM). The figure shows in red the plasma membrane staining revealed by CELT-327 specifically in HeLa cells.

Fixed-cell Imaging Application of CELT-327 to fixed colorectal cancer cells. View Larger

Application of CELT-327 to fixed colorectal cancer cells. HCT116 cells were fixed with PFA 4% (20 mins at room temperature) and then incubated with CELT-327 (250 nM) for 30 mins at room temperature, washed and visualized immediately (A), or 96h post-staining (B).

Optical Data for CELT-327

Emission Color Orange
λabs 589 nm
λem 616 nm
Closest Laser line 561 nm
Application Confocal microscopy, High-content screening

Plan Your Experiments

Use our spectra viewer to interactively plan your experiments, assessing multiplexing options. View the excitation and emission spectra for our fluorescent dye range and other commonly used dyes.

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Technical Data

Store at -20°C

The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis.
Tocris products are intended for laboratory research use only, unless stated otherwise.

Additional Information

Licensing Caveats:
Sold under license from Celtarys Research

Product Datasheets

Reconstitution Calculator
Molarity Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Molarity Calculator


*When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and CoA (available online).


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