Biochemistry Metabolism of protein and amino acid 9f53d5c3 Serotonin is synthesized from A Tryrosine B Alanine C Tryptophan D Glycine High-Yield Explanation Serotonin is synthesized from tryptophanRef: DM Vasudevan - Textbook of Biochemistry, 7th edition, page no: 241, fig 18.10