Effect of acute imipramine (A, B) or phenelzine treatment (C, D) on immobility behavior in C57BL/6 floxed GR or FBGRKO-T29-1 mice during (A, C) and corticosterone levels (B, D) immediately after an 8 min TST. Group ns are shown within the data bars. Group sizes differ between immobility behavior (C) and corticosterone (D) graphs because we were unable to collect plasma in some mice for corticosterone assay. *, P=<0.05 vs. saline-treated mice within the same genotype.