Only Peyer's patch cells harvested from C3H/HeJ CLP mice showed a marked decline in viable cell yield (A), which is associated with a significant increase in both the frequency of A_o (B) and percentage of Fas⁺ cells (C). Significance indicate by * at P< .05 versus sham, Mann-Whitney U test; Mean ± SEM; n = 6 mice sampled /group.