HeLa cells labeled with Tom20 antibody to visualize mitochondria (a, d) are then treated with 1 μM GA-Bodipy for 30 min followed by washing. Cells were then further incubated with 0.1% DMSO (a, b, c) or 10 μM cluvenone (d, e, f) for 1 h followed by washing. Mitochondria (in red) are shown in (a) and (d). BODIPY fluorescence (green) is shown in (b) and (e). Merged images are in (c) and (f).