Table 7.

NADH oxidase activity of freeze-thawed rat liver mitochondria (1 mg protein per mL) in the presence or absence of tryptophan metabolites, respectively, given in nmol O × min⁻¹ × mg⁻¹.

SUBSTANCES	0 µM	1000 µM
L-KYN	74.9 ± 3.0	84.0 ± 1.9*
KYNA	77.5 ± 4.5	81.8 ± 2.0
3-OH-KYN	69.8 ± 1.5	87.7 ± 2.3***
XAN	70.8 ± 1.0	73.4 ± 2.0
3-OH-ANA	40.5 ± 1.8	58.0 ± 1.3***

Notes: Data are means ± S.E.M; n = 4;

^*P < 0.05,

^***P < 0.001 in comparison to the respective control (0 µM).