CD4 and Sepsis: In addition, there was no observed difference in the expression of several canonical extrinsic death-inducing proteins known to limit the expansion of CD4 T cells (i.e. Fas, FasL, TRAIL) between sham and CLP hosts for either the pre- or post-transfer groups (Figure 6—figure supplement 1) further supporting the notion that survival differences do not account for the numerical deficit in CD4 T cells exposed to sepsis.