Figure 2: Apoptotic characteristics of the Zn-induced death of GT1-7 cells. A: GT1-7 cells were exposued to ZnCl2 (50 μM) and were then fixed using paraformaldehyde after 24 h. The GT1-7 cells were observed with TUNEL staining by fluorescent microscopy. Scale bar represents 50 μm. B: The GT1-7 cells were observed with Hoechst staining by fluorescent microscopy after 24 h of exposure to Zn. C: Gel electrophoresis of DNA extracted from GT1-7 cells. M: marker, T: thapsigargin as a positive control.