All of the following are derivatives of tryptophan EXCEPT:
Ans. (d) Creatinine* Tryptophan is one of the essential aromatic amino acid* Metabolic fate of tryptophan: Metabolized by enzyme Tryptophan oxygenase (pyrrolase)* Derivatives of tryptophan:# Niacin (Nicotinic acid)# Serotonin# Melatonin* Note: Creatinine is synthesized from 3 amino acids namely: Glycine, Arginine. Methionine
Melatonin
Serotonin
Niacin
Creatinine
Proteins and Amino Acids