Xanthinurate is a product/intermediate metabolite of: (A) Phenylalanine, (B) Leucine, (C) Tryptophan, (D) Isoleucine
Answer is C. Conversion of tryptophan metabolite 3 hydroxy kynurenine to 2 hydroxy anthranilate is impaired in vitamin B6 deficiency? hence large amount of xanthinurate is formed.