Bipath, Priyesh; Levay, Peter Ferenc; Viljoen, Margaretha
(BioMed Central, 2016-02-17)
BACKGROUND : The essential amino acid tryptophan cannot be synthesised in the body and must be acquired
through dietary intake. Oxidation of tryptophan, due to immune induction of the enzyme indoleamine 2,3-
dioxygenase ...