Biochemistry General 63561008 Catecholamines are synthesized from ? A Tryptophan B Tyrosine C Methionine D Histidine High-Yield Explanation Ans. is 'b' i.e., Tyrosine Catecholamines (epinephrine, norepinephrine and dopamine) are synthesized from tyrosin. Has been explained in previous seesions.