Tryptophan Hydroxylase 2 Knockout Male Rats Exhibit a Strengthened Oxytocin System, Are Aggressive, and Are Less Anxious.

Indeed, the Tph2 +/– groups showed a trend toward more mounting behaviors than the Tph2 +/+ group ( Figure 2 C, ANOVA: F 2,23 = 7.21, p < 0.01, permutation test: g Tph2+/+<Tph2+/– = 0.64 [−0.42; 1.36], p = 0.16).

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