Fig. 7. (a) Fluorescence images of HeLa cells after incubating with 2 for 1 h (left) and subsequently treated with nigericin in phosphate buffer (pH = 8). Ex: 470 ± 20 nm, Em: >515 nm for both conditions. (b) Fluorescence microscopic analysis of HeLa cells treated with 5 or 10 μM of 1a after 30 min at 37 °C and then stained with acridine orange. Results are typical of three independent experiments.
