BAX and infection: As shown in Figure 9A and B, the expression of pro-apoptotic member bax significantly decreased in the cytosolic fraction from 12 h p.i. onwards (P<0.01, P<0.001), whereas, in the mitochondrial fraction, significantly increased at the same times (P<0.001), indicating the translocation of this protein from the cytosol into the mitochondrial compartment following infection (Figure 9A, B).