I am willing to do TUNEL staining in transient focal cerebral ischemia challenged mouse brain section to observe the extent of apoptosis. I have got lots of different methodologies mentioned in literatures or online as well. However they lack detail experimental protocol. Could you please forward me the suitable protocol for TUNEL staining in detail ? it would be better if you send me the one that you are applying currently in your lab. I will use this technique for OCT preserved frozen brain section which are pefused with 4% praformaldehyde.