PBFI K⁺ Salt

$360.00

Ratiometric potassium (K⁺) indicator, membrane impermeable

 

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SPECIFICATIONS

Excitation:

340  380 nm 

Emission:

505 nm 

Kd:

5 mM

Synonyms: Potassium-binding benzofuran isophthalate – AM, Potassium binding indicator
Product code: 1mg: 3031B / 20x 50mg: 3031E

product description

PBFI is a UV-excitable, ratiometric green indicator for intracellular potassium (K⁺) measurements. Ex/Em: 340/505 nm can be used to measure K⁺-bound PBFI, and Ex/Em: 380/505 nm can be used to detect K⁺-free PBFI. It is 1.5X more selective for K⁺ over Na⁺and works well in cytosolic conditions where [K⁺]/[Na⁺] is ~10. Ratiometry is optimal for imaging applications where quantification of intracellular K⁺ concentrations is desired and reduces effects of photobleaching, heterogenous dye loading, and variable cell morphology.

PBFI K⁺ salt is a membrane impermeable form of PBFI that can be used in lipid membrane-free systems, in liposomes, or can be introduced into cells by electroporation, microinjection, or other methods.

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