Fura-2 leakage resistant is a cell-impermeable, ratiometric fluorescent calcium indicator. It binds to calcium (Kd = 145 nm) and displays excitation maxima of 340 and 380 nm when calcium-bound or calcium-free, respectively, when the emission is fixed at 505 nm. Fura-2 leakage resistant can be used in lipid membrane-free systems or liposomes or can be introduced into cells by electroporation, microinjection, or other methods. Fura-2 leakage resistant is also available in a cell-permeable form (Item No. 34993).WARNING This product is not for human or veterinary use.
