Biochemistry Structure and function of protein 5d481a30 All have aromatic rings except A Phenylalanine B Tyrosine C Tryptophan D Lysine High-Yield Explanation Aromatic amino acids are Tyrosine, tryptophan, and phenylalanine.Ref: Textbook of medical biochemistry, MN Chatterji, 8th edition, page no: 78