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3-hydroxyanthranilate 3,4-dioxygenase Members of this protein family, from both bacteria and eukaryotes, are the enzyme 3-hydroxyanthranilate 3,4-dioxygenase. This enzyme acts on the tryptophan metabolite 3-hydroxyanthranilate and produces 2-amino-3-carboxymuconate semialdehyde, which can rearrange spontaneously to quinolinic acid and feed into nicotinamide biosynthesis, or undergo further enzymatic degradation.
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