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Normalized expression rates [knockout (KO)/wild-type (WT)] of tyrosine hydroxylase (TH), trace amine-associated receptor 1 (TAAR1), serotonin transporter (Slc6a4), and dopamine receptor 2 (D2), in ventral striatum samples of rats. For each of the assayed genes, there were no significant differences in expression levels between WT and KO rats.
