An example of a Western blot probed for Bcl-2 anti-apoptotic indicator. Lanes 1–4: TBI+, 5–8: TBI+, 9–12: TBI+13–16: TBI+. Within each group of four lanes, the sample order is right cortex upper, left cortex upper, right cortex lower, left cortex lower. Markers not visible because of stripping.