Phenylketonuria is an inherited disease that results from the lack of the enzyme phenylalanine hydroxylase (PAH), which catalyzes

hydroxylation of phenylalanine to tyrosine

Explanation:

Phenylketonuria is an inherited disease that results from the lack of the enzyme phenylalanine hydroxylase (PAH), which catalyzes the hydroxylation of phenylalanine go tyrosine. A build up of phenylalanine could result to mental instability , intellectual problems and seizures. This is because of the body’s inability to convert phenylalanine to tyrosine.

Tyrosine is an important amino acid which helps in the production of neurotransmitters which ensures proper functioning of the brain cells.