Precursor of tyrosine is:
Phenylalanine in the presence of phenylalanine hydroxylase forms tyrosine . So precursor for tyrosine is phenylalanine Extra Information: Enzyme Disease Phenylalanine hydroxylase Classical phenylketonuria or PKU-1 Dihydrobiopterin reductase Non-classical PKU type 2 & 3 GTP-Cyclo hydrolase Non-classical type 4 or 5
Cysteine
Histidine
Tryptophan
Phenylalanine
Classification and metabolism of amino acids