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ION Biosciences Fluo-4 K+ Salt
 
Green fluorescent, calcium (Ca²+) indicator, membrane impermeable.
 
Fluo-4 is the most popular green fluorescent, calcium (Ca²+) indicator. Proven and trusted for decades to measure intracellular Ca²+ flux in high throughput screening and fluorescence microscopy applications.

Fluo-4 K+ Salt is a membrane impermeable form of Fluo-4 that can be used in lipid membrane-free systems, in liposomes, or can be introduced into cells by electroporation, microinjection or other methods.
ION Biosciences Fura-2 AM
 
UV-excitable, ratiometric green calcium (Ca²+) indicator, membrane permeable.
 
Fura-2 is the most popular UV-excitable, ratiometric green indicator for intracellular calcium (Ca²+) measurements. Ex/Em: 340/505 nm can be used to measure Ca²+-bound Fura-2, and Ex/Em: 380/505 nm can be used to detect Ca²+-free Fura-2. Ratiometry is optimal for imaging applications where quantification of intracellular Ca²+ concentrations is desired, and reduces effects of photobleaching, heterogenous dye loading, and variable cell morphology.
ION Biosciences Fura-2 K+ Salt
 
Ratiometric calcium (Ca²+) indicator, membrane impermeable.
 
Fura-2 is the most popular UV-excitable, ratiometric green indicator for calcium (Ca²+) measurements. Ex/Em: 340/505 nm can be used to measure Ca²+-bound Fura-2, and Ex/Em: 380/505 nm can be used to detect Ca²+-free Fura-2. Ratiometry is optimal for imaging applications where quantification of intracellular Ca²+ concentrations is desired, and reduces effects of photobleaching, heterogenous dye loading, and variable cell morphology.
 
Fura-2 K+ salt is a membrane impermeable form of Fura-2 that can be used in lipid membrane-free systems, in liposomes, or can be introduced into cells by electroporation, microinjection or other methods.
ION Biosciences Fura-2 LR AM
 
Leakage-resistant, ratiometric calcium (Ca²+) indicator, membrane permeable.
 
UV-excitable, ratiometric green indicator for intracellular calcium (Ca²+) measurements with longer cellular retention compared to Fura-2 AM and similar spectral properties. Ex/Em: 340/505 nm can be used to measure Ca²+-bound Fura-2, and Ex/Em: 380/505 nm can be used to detect Ca²+-free Fura-2. Ratiometry is optimal for imaging applications where quantification of intracellular Ca²+ concentrations is desired, and reduces effects of photobleaching, heterogenous dye loading, and variable cell morphology.
ION Biosciences Fura-2 LR K+ Salt
 
Leakage-resistant, ratiometric calcium (Ca²+) indicator, membrane impermeable.
 
UV-excitable, ratiometric green indicator for intracellular calcium (Ca²+) measurements with longer cellular retention compared to Fura-2 AM and similar spectral properties. Ex/Em: 340/505 nm can be used to measure Ca²+-bound Fura-2, and Ex/Em: 380/505 nm can be used to detect Ca²+-free Fura-2. Ratiometry is optimal for imaging applications where quantification of intracellular Ca²+ concentrations is desired, and reduces effects of photobleaching, heterogenous dye loading, and variable cell morphology.
 
Fura-2 LR K+ salt is a membrane impermeable form of Fura-2 LR that can be used in lipid membrane-free systems, in liposomes, or can be introduced into cells by electroporation, microinjection or other methods.
ION Biosciences ICR-1 AM

Red fluorescent, calcium (Ca²+) indicator, membrane permeable. Optimal for multiplexing and tissue imaging. Fluorescence lifetime and multiphoton compatible.
 
ION Calcium Red – 1 (ICR-1) is a red fluorescent (Ex/Em 580nm/660nm) calcium (Ca²+) indicator for intracellular Ca²+ measurements.

ICR-1’s long-wavelength emission and a large Stokes shift reduces contributions of autofluorescence, making ICR-1 AM optimal for cellular and tissue imaging applications. ICR-1 can also be multiplexed with GFP-labeled cells or other green fluorophores commonly used in experiments. Unlike some other red fluorescent Ca²+ indicators, ICR-1 does not accumulate in the mitochondria. Data supporting fluorescence lifetime imaging and multiphoton imaging capabilities have also been demonstrated.
ION Biosciences ICR-1 K+ Salt
 
ION Calcium Red – 1 (ICR-1) is a red fluorescent (Ex/Em 580nm/660nm) calcium (Ca²) indicator for intracellular Ca²+ measurements. ICR-1’s long-wavelength emission and a large Stokes shift reduces contributions of autofluorescence, making ICR-1 AM optimal for cellular and tissue imaging applications. ICR-1 can also be multiplexed with GFP-labeled cells or other green fluorophores commonly used in experiments. Unlike some other red fluorescent Ca²+ indicators, ICR-1 does not accumulate in the mitochondria. Data supporting fluorescence lifetime imaging and multiphoton imaging capabilities have also been demonstrated.
 
ICR-1 K+ salt is a membrane impermeable form of ICR-1 that can be used in lipid membrane-free systems, in liposomes, or can be introduced into cells by electroporation, microinjection or other methods.
ION Biosciences ING-2 AM

Yellow-green fluorescent, sodium (Na+) indicator, membrane permeable. Higher Na+ affinity than ING-1.
 
ION Natrium Green – 2 (ING-2) is a yellow-green fluorescent, intracellular sodium (Na+) indicator with improved cellular loading and significantly higher brightness than SBFI. Its spectral properties (Ex/Em: 525 nm/545 nm) and large dynamic range make ING-2 the best Na+ indicator for high-throughput screening applications targeting Na+ channels, and non-selective monovalent cation channels. ING-2 has a more physiologically relevant affinity (Kd = 20 mM) than ING-1 (Kd = 92 mM). Also compatible with fluorescence microscopy using common fluorescein, GFP or more ideally YFP filters.
ION Biosciences ING-2 TMA+ Salt

Yellow-green fluorescent, sodium (Na+) indicator, membrane impermeable. Higher Na+ affinity than ING-1.
 
ION Natrium Green – 2 (ING-2) is a yellow-green fluorescent, intracellular sodium (Na+) indicator with improved cellular loading and significantly higher brightness than SBFI. Its spectral properties (Ex/Em: 525 nm/545 nm) and large dynamic range make ING-2 the best Na+ indicator for high-throughput screening applications targeting Na+ channels, and non-selective monovalent cation channels. ING-2 has a more physiologically relevant affinity (Kd = 20 mM) than ING-1 (Kd = 92 mM). Also compatible with fluorescence microscopy using common fluorescein, GFP or more ideally YFP filters.
 
ING-2 TMA+ salt is a membrane impermeable form of ING-2 that can be used in lipid membrane-free systems, in liposomes, or can be introduced
MDR Activity Kit
 
ION’s Multidrug Resistance (MDR) Activity kit is an effective solution for detecting MDR1 and MRP1 activity and compounds susceptible to MDR–mediated efflux. ION’s MDR Activity kit is compatible with fluorescence microscopy, flow cytometry, and fluorescence plate readers using FITC/fluorescein settings.

Calcein AM is a membrane-permeant, non-fluorescent dye that enters cells passively. Once inside the cytosol of cells, intracellular esterases convert it to fluorescent Calcein (Ex/Em: 495 nm/515 nm), resulting in uniform cytosolic fluorescence. Drug efflux transporters, such as P-glycoprotein (Pgp, MDR1) and multidrug-resistance-associated protein (MRP1), actively extrude Calcein AM from inside the cell before esterases can convert it to Calcein. The presence of additional MDR substrates or inhibitors of MDR expression results in decreased Calcein AM efflux, causing a measurable increase in intracellular fluorescence. In addition to identifying MDR substrates and inhibitors, this kit can also be used to evaluate the activity of MDR transporters in cells.

When following our protocol, ION’s MDR Activity kit provides enough reagents to make 100 mL of working solution, enough for ten 96- or 384-well plates or 80 flow cytometry samples. The actual number of assays will vary according to optimal dye concentrations for your application.

ION VITAL – MitoVolt
 
Mitochondrial membrane potential assay kit that uses JC-10, a membrane potential sensitive dye that is more soluble than JC-1.
 
ION Vital – MitoVolt assay kit is the ideal solution for detecting changes in mitochondrial membrane potential due to cell apoptosis or other stress-inducing phenomena. ION Vital – MitoVolt is compatible with fluorescence microscopy, flow cytometry, and plate reader applications.
 
JC-10 is a mitochondrial membrane potential probe. It possesses superior aqueous solubility compared to its better known analogue, JC-1. At low concentrations, JC-10 is monomeric and emits a green fluorescence.
JC-10 accumulates in healthy mitochondria, forming J-aggregates that exhibit an orange fluorescence. Mitochondrial depolarization, a key marker of cellular apoptosis, results in a loss of JC-10 accumulation and a reversal to its monomeric form. This reversible behavior of JC-10 allows for ratiometric analysis of mitochondrial membrane potential, where a shift from orange (Ex/Em: 540nm/590nm) to green fluorescence (Ex/Em: 490nm/525nm) is indicative of compromised mitochondria.
 
ION Vital – MitoVolt can be used to monitor and/or visualize mitochondrial membrane potential as a static endpoint or in real-time. When following our protocol, ION Vital – MitoVolt provides enough reagents to make 25 mL of working solution, enough for five 96-well plates or 500 flow cytometry samples. The actual number of assays will vary according to optimal dye concentrations and assay volumes for your application.
ION Biosciences IPG-1 AM

Yellow-green fluorescent, potassium (K+) indicator, membrane permeable.
 
Lower K+ affinity than IPG-2 and IPG-4.
 
ION Potassium Green – 1 (IPG-1) is the best in class yellow-green fluorescent, intracellular potassium (K+) indicator for measuring changes at most intracellular K+ concentrations. IPG-1 has Ex/Em: 525 nm/545 nm and a high-sensitivity to detect small changes in K+ concentration. IPG-1 has a lower affinity (Kd = 50 mM) than IPG-2 (Kd = 18 mM) or IPG-4 (Kd = 7 mM).
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