An example of a Western blot probed for Bax pro-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. Molecular weight markers seen (left edge of figure) are, from top, 30 and 20 kDa.