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  • Title: Gourami lenses convert tryptophan into 3-hydroxykynurenine.
    Author: Truscott RJ, Wood AM.
    Journal: Ophthalmic Res; 1994; 26(4):214-8. PubMed ID: 7808731.
    Abstract:
    Although free tryptophan was found in the lens of both the kissing gourami (Helostoma temmincki) and the 3-spot gourami (Trichogaster trichopterus), only the lens of the latter species contained 3-hydroxykynurenine. Radiolabel experiments carried out on 3-spot gourami lenses in culture demonstrated that, as in humans, lenticular tryptophan is converted to 3-hydroxykynurenine probably via the intermediate kynurenine.
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