K+ Indicator Probes

PBFI is the cell-impermeant fluorescent indicator that is widely used for the determination of concentrations of K⁺ (Ex/Em = 340,380/500 nm).

Asante potassium green-2 TMA (APG-2 (TMA)) is a cell-impermeable K⁺ fluorescent indicator that produces a fluorescent response to changes in extracellular potassium ion concentration (Ex/Em = 525/545 nm).

Asante potassium green-1 (APG-1) TMA is a cell-impermeable K⁺ (potassium) sensitive fluorescent indicator (excitation/emission = 525/545 nm).

Asante potassium green-1 AM (APG-1 AM) is a cell-permeable K⁺-sensitive fluorescent indicator and potassium ion indicator that exhibits minimal interference from Na⁺ and pH at physiologically relevant intracellular levels. Asante potassium green-1 AM enables non-invasive monitoring and quantitative analysis of intracellular potassium ion concentrations (Ex/Em = 522/547 nm).

IPG-2 AM (APG-2 Acetoxymethyl ester) is a membrane-permeant acetoxymethyl ester derivative and selective fluorescent potassium ion indicator. IPG-2 AM exhibits fluorescence increases proportional to extracellular potassium ion concentrations. IPG-2 AM enables real-time monitoring of cytosolic free potassium ion fluxes in human platelets and macrophages. IPG-2 AM can be used for the research of intracellular potassium concentration dynamics.