Which of the following will NOT result in the development of phenylketonuria?

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Phenylketonuria (PKU) is characterized by phenylalanine not being converted to tyrosine.As tyrosine is an end product of the metabolic process, insufficiency of tyrosine does not lead to PKU development.PKU may develop through the lack of three different enzymes.The classic PKU involves a deficiency of phenylalanine hydroxylase and prevents the conversion of phenylalanine to tyrosine.A deficiency of dihydropteridine reductase prevents the conversion of quinonoid (qBH4) to tetrahydrobiopterin (BH4), which is the cofactor in the phe to tyr conversion.BH4 is produced from biopterin precursor.Biopterin may be limited because of deficiency of a biopterin synthetase.

Which of the Following Will NOT Result in the Development