Table 2:

HINT1 +/+ and −/− male and female locomotor activity counts at 0.1 mg/kg nicotine

Groups	Locomotor activity counts ± SEM
HINT1 +/+ male	86 ± 43
HINT1 −/− male	306 ± 28*
HINT1 +/+ female	473 ± 43**
HINT1 −/− female	849 ± 36**

^*Denotes P < 0.05 vs. HINT1 +/+ male mice;

^**Denotes P < 0.05 vs. male counterparts.