Essential Biochemistry - Protein Metabolism (Section 8 - No. 47)

Which of the following is associated with Hartnup disease?

Defect in the transport of neutral amino acids

Increased levels of tryptophan in the urine

Skin rash

Deficiency in the kynurenine pathway

Hartnup disease involves a defect in the transport of neutral amino acids, leading to high levels of tryptophan in the urine and a skin rash.