Yellow-green fluorescent, potassium (K+) indicator, membrane permeable.
 

Higher K+ affinity than IPG-1 and IPG-2
 

Yellow-green fluorescent, potassium (K+) indicator, membrane
 

impermeable. 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).
 

IPG-1 TMA+ salt is a membrane impermeable form of IPG-1 that can be used in lipid membrane-free systems, in liposomes, or can be introduced into cells by electroporation, microinjection or other methods.

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).

ION Biosciences IPG-2 TMA+ Salt
 
Yellow-green fluorescent, potassium (K+) indicator, membrane
 

impermeable. Lower K+ affinity than IPG-4 and higher affinity than IPG-1
 

ION Potassium Green – 2 (IPG-2) is a yellow-green fluorescent, intracellular potassium (K+) indicator with Ex/Em: 525 nm/545 nm and a high-sensitivity to detect small changes in K+ concentration. IPG-2 has a higher affinity (Kd = 18 mM) than IPG-1 (Kd = 50 mM) and lower affinity than IPG-4 (Kd = 7 mM).
 

IPG-2 TMA+ salt is a membrane impermeable form of IPG-2 that can be used in lipid membrane-free systems, in liposomes, or can be introduced into cells by electroporation, microinjection or other methods

Yellow-green fluorescent, potassium (K+) indicator, membrane
 

impermeable. Higher K+ affinity than IPG-1 and IPG-2.
 

ION Potassium Green – 4 (IPG-4) is a yellow-green fluorescent, intracellular potassium (K+) indicator with Ex/Em: 525 nm/545 nm and a high-sensitivity to detect small changes in K+ concentration. IPG-4 has the highest affinity (Kd = 7 mM) among IPG analogues – IPG-2 (Kd = 18 mM) and IPG-1 (Kd = 50 mM).
 

IPG-4 TMA+ salt is a membrane impermeable form of IPG-4 that can be used in lipid membrane-free systems, in liposomes, or can be introduced into cells by electroporation, microinjection or other methods. IPG-4 has been successfully used as a sensor for extracellular K+.