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Figure 3 | BMC Physiology

Figure 3

From: Relationships among body mass, brain size, gut length, and blood tryptophan and serotonin in young wild-type mice

Figure 3

Relationships between highly correlated variables. (A) The relationship between body mass and blood 5-HT concentration. The long and short arrows indicate two potential outliers with high blood 5-HT concentration. (B) The blood tryptophan concentration of the two potential outliers in (A) appears to be normal (the corresponding arrows). (C) The relationship between gut length and the brain/body mass ratio. (D) The relationship between blood tryptophan concentration and the volume of the hippocampal complex.

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