Fig. 1

Experiment 1. In all cases, closed bars represent baseline values, and open bars represent values obtained after 2 wk swim stress. (A) Mean (± SEM) serum anti-KLH immunoglobulin G concentrations (represented as a percentage of the plate positive). (B) Mean (± SEM) splenocyte proliferation values (represented as absorbance units). (C) Mean (± SEM) serum corticosterone concentrations (ng/ml). Closed bars represent baseline, pre-stress values, and open bars represent values obtained after 2 wk stress. * Significantly greater than WT, baseline; ** Significantly greater than all other groups (p < 0.05).