Table 1. Null Activities of βArr2 Mice.

Genotypea	Treatment conditionb	Mean null activity (mAmp)	SEM
WT	Veh–Veh	2.60	±0.18
	Veh–0.2 mg/kg UNC9975	2.57	±0.39
	Veh–0.5 mg/kg UNC9975	1.88	±0.39
	Veh–1 mg/kg UNC9975	4.19	±0.39
	PCP–Vehc	5.45	±0.98
	PCP–0.2 mg/kg UNC9975c	5.97	±1.21
	PCP–0.5 mg/kg UNC9975c	4.09	±0.46
	PCP–1 mg/kg UNC9975c	6.88	±0.75
KO	Veh–Veh	3.10	±0.51
	Veh–0.2 mg/kg UNC9975	2.68	±0.41
	Veh–0.5 mg/kg UNC9975	2.34	±0.42
	Veh–1 mg/kg UNC9975	5.29	±0.62
	PCP–Vehc	5.55	±0.74
	PCP–0.2 mg/kg UNC9975c	5.33	±1.06
	PCP–0.5 mg/kg UNC9975c	4.11	±0.46
	PCP–1 mg/kg UNC9975c	9.09	±1.46

^aN=9–23 mice/genotype/treatment condition.

^bA two-way ANOVA for null activity found only the main effect of treatment was significant (F_{(7, 187)}=10.94, p<0.001).

^cPCP=phencyclidine, 6 mg/kg was given.