Fig. 4From: Effect of water-immersion restraint stress on tryptophan catabolism through the kynurenine pathway in rat tissuesConcentration of tryptophan (Trp) in serum and levels of Trp in various tissues of rats subjected (+) or not (−) to 6 h of WIRS based on assays of Trp described in the Materials and methods. Each value is the mean ± SD (n = 7 −WIRS rats; n = 8 +WIRS rats). *P < 0.05 (vs. −WIRS rats)Back to article page