TABLE 3.

Concentrations in nm/kg of other non-kynurenine Trp catabolites in caput epididymis extracts

For non-kynurenine Trp derivatives (namely indoxyl acetic acid (IAA), serotonin, and melatonin), mean concentrations are given in nmol/g. S.E. values (n = 3) are shown in italic type. Numbers with plus and minus symbols preceding indicate positive (+) or negative (−) -fold differences between WT and Ido1^−/− animals.

	IAA	Serotonin	Melatonin
WT
Mean	133.75	1708.40	9.80
S.E.	9.18	355.20	0.69
Ido1−/−
Mean	140.92	2382.83	11.07
S.E.	16.90	641.70	0.53
Ido1−/− versus WT (-fold difference)	+1.05	+1.39	+1.13