Fluo-3FF, pentapotassium salt Cat # 21019 Storage F/D/L (see storage codes below) Unit Size 1 mgEx (nm) 506 Em (nm) 526 MW 981.94 Solvent Water The cell-impermeant Fluo-3FF is an analog of Fluo-3 with much lower calcium binding affinity, Kd ~10 礛. Like Fluo-3, this indicator is essentially nonfluorescent, but exhibits strong fluorescence enhancement with no spectral shift upon binding calcium. Detailed I
