The Ca
2+ ionophore
A-23187 is commonly used for in situ calibrations of fluorescent Ca
2+ indicators, to equilibrate intracellular and extracellular Ca
2+ concentrations and to permit Mn
2+ to enter the cell to quench intracellular dye fluorescence. Although the intrinsic fluorescence of A-23197 is too high for use with UV-excitable calcium indicators like fura-2, indo-1 and quin-2 it is suitable for use with the visible light-excitable indicators, including fluo-4, fluo-3, Calcium Green and rhod-2. A-23187 can also be used to equilibrate extracelular and intrcellular Mg
2+ concentrations, making it useful for calibrating Mg
2+ indicators.
Learn more about ion indicators including calcium, potassium, pH, and membrane potential indicators ›For Research Use Only. Not for use in diagnostic procedures.