kynurenine /kyn·ure·nine/ (kin″u-rĕ´nēn) an aromatic amino acid, first isolated from dog urine; it is an intermediate in the catabolism of tryptophan.
kyn·u·re·nine (k n-y r  -n n , k n-, kny-rnn, -r nn, kny-)n. An amino acid that is a precursor of kynurenic acid and that is excreted in small amounts in the urine as a product of the metabolism of tryptophan. |
kynurenine
a metabolite of tryptophan found in microorganisms and in the urine of normal animals; it is a precursor of kynurenic acid and an intermediate in the conversion of tryptophan to niacin.
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