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No sex or β-arrestin 1 genotype effect on preference of natural reward, sucrose. A two-bottle, limited access procedure of increasing concentrations of sucrose (0.25–4%) for a total of 10 days revealed no sex (n = 26 males, n = 24 females), genotype, or interaction effect on average sucrose preference. Significance by two-way ANOVA with multiple comparisons (Tukey within sex, Sidek between genotype); data represented as mean ± SEM.
