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The effect of Zn treatment on the immobility time in the FST in the 5-HT1A +/+ (WT) (a) and 5-HT1A autoreceptor−/− (KO) (b) mice. Zn at the dose of 5 mg/kg was administered 30 min before the FST. The data bars represent the mean ± SEM for n = 3–5 mice. *p < 0.05 compared to the VEH group. Statistical analysis was performed using Student’s t test
