Protein Catabolism Intermediates - Biochemistry

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Question

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?

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Answer

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

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