IPG-2 TMA is a cell-impermeable fluorescent potassium indicator. It binds to potassium (Kd = 18 mM) and displays excitation/emission maxima of 525/545 nm, respectively. IPG-2 TMA can be used in lipid membrane-free systems or liposomes or can be introduced into cells by electroporation, microinjection, or other methods. IPG-2 is also available in a cell-permeable form .
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