Fig. 2. (A-F) Sample records from a time-series confocal measurements of cytoc-GFP distribution (left) and Mitotracker distribution (right) on two living HeLa cells during UV-induced apoptosis. Elapsed time following the UV treatment is shown in each panel. Scale bar, 20 µm. (G-I) Magnified Mitotracker images of the upper cell shown in (C,D,F). These panels show the detailed structure of mitochondria before (G), during (H) and after (I) cytochrome c release. Scale bar: 4 µm.