Table 2. Genotype differences in alcohol (7.5, 15 or 30%) preference after 4 days of drinking-in-the-dark (DID) in male (A) and female (B) nPE mice.

On the test day, both alcohol (7.5%, 15% or 30% concentration) and water were presented 3 hours after the beginning of dark cycle, and alcohol and water intake values were recorded after 4 hours of alcohol access in the nPE+/+ and nPE−/− mice. Genotype difference: ^*p<0.05 vs. nPE+/+ by Student’s t-tests.

A. Males
Genotype	7.5% alcohol		15% alcohol		30% alcohol
	nPE+/+ (n=5)	nPE−/− (n=5)	nPE+/+ (n=9)	nPE−/− (n=8)	nPE+/+ (n=5)	nPE−/− (n=5)
Alcohol Preference	0.83±0.04	0.60±0.03*	0.67±0.08	0.42±0.04*	0.50±0.04	0.51±0.04

B. Females
Genotype	7.5% alcohol		15% alcohol		30% alcohol
	nPE+/+ (n=5)	nPE−/− (n=5)	nPE+/+ (n=6)	nPE−/− (n=7)	nPE+/+ (n=6)	nPE−/− (n=6)
Alcohol Preference	0.85±0.03	0.54±0.02*	0.61±0.06	0.24±0.07*	0.55±0.07	0.59±0.02