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Calcium Detection with Cal-520

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Cal-520™ enables probenecid-free Ca2+ assays with significantly higher S/N ratio than any other commercially available fluorescent Ca2+ indicator.


Cal-520™ AM is a new fluorogenic calcium-sensitive dye with a significantly improved signal to noise ratio and intracellular retention compared to the existing green calcium indicators (such as Fluo-3 AM and Fluo-4 AM). Cells expressing a GPCR or calcium channel of interest that signals through calcium can be preloaded with Cal-520™ AM which can cross cell membrane. Once inside the cell, the lipophilic blocking groups of Cal 520™ AM are cleaved by esterases, resulting in a negatively charged fluorescent dye that stays inside cells. Its fluorescence is greatly enhanced upon binding to calcium.

 

When cells stimulated with agonists, the receptor signals the release of intracellular calcium, which significantly increase the fluorescence of Cal-520™. The characteristics of its long wavelength, high sensitivity, and >100 times fluorescence enhancement, make Cal-520™ AM an ideal indicator for the measurement of cellular calcium. The high S/N ratio and better intracellular retention make the Cal-520(TM) calcium assay a robust tool for evaluating GPCR and calcium channel targets as well as for screening their agonists and antagonists.

 
Cal 520™ AM technology has the following benefits and features:

Find more information in this poster.

 

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