Biochemistry Xanthurenic acid, accumulation occurs due to pyridoxine deficiency, is a metabolite of which amino acid? A Tyrosine B Phenylalanine C Tryptophan D Alanine 💡 Explanation Xanthurenic acid, accumulation occurs due to pyridoxine deficiency, is a metabolite of which amino acid? ✓ Correct Answer: C. Tryptophan