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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
In Hartnup disorder, metabolism of which of the following amino acids is affected?
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The correct answer is  b. Tryptophan(Ref: Nelson's 20/e p 648-649)In Hartnup disorder, there is a defect in transport of monoamino-monocarboxylic amino acids (neutral amino acids), including tryptophan, by intestinal mucosa & renal tubules due to mutation of SLC6A19 gene located on chr 5pl 5