Fig. 3.

Emission spectra of RES and Fura-2. Separate measurements (A) of 340 nm (Ca²⁺-bound, blue) and 380 nm (Ca²⁺-free, orange) signal intensity in MDA cells with 5 µM TG and 100 µM RES treatments at 1 min and 6 min, respectively, as indicated by the arrows. This data (A) is representative of all experiments conducted at these concentrations. Emission spectra (B) in 1 mM Ca²⁺ solution when excited at 340 nm of 100 µM RES (blue), and 5 µM Fura-2 (yellow).