Protein Catabolism Intermediates

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Biochemistry › Protein Catabolism Intermediates

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Phenylketonuria is a genetic disorder resulting in a lack of phenylalanine hydroxylase activity. During the first step of phenylalanine metabolism, phenylalanine is hydroxylated into what amino acid?

Tyrosine

CORRECT

Tryptophan

0

Serine

0

Threonine

0

Alanine

0

Explanation

The first step in phenylalanine metabolism is conversion of phenylalanine to tyrosine. Tyrsoine is simply a hydroxylated version of phenylalanine.

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