Nerve agents exposure dysregulates Cdk5 activity in vivo. Effects of systemic exposure to PB, DEET, and DFP on p25 generation and Cdk5-dependent phosphorylation of P-T75 DARPP-32 in mouse striatum (a and b). Representative blots from tissue taken 2 or 6 h after treatments are shown above quantification. Effects of systemic exposure to PB, DEET, and DFP on p25 generation in hippocampus (c and d). *p=0.0108, **p=0.0045, ***p=0.0004, Student’s t-test, for a, n=3-4. *p=0.0102, #p<0.0001, Student’s t-test, for b, n=3-4.