Essential Biochemistry - Protein Metabolism (Section 5 - No. 47)
What enzyme is deficient in phenylketonuria (PKU)?
Tyrosine aminotransferase
Phenylalanine hydroxylase
Tryptophan oxygenase
Histidine decarboxylase
Explanation
Phenylketonuria is caused by a deficiency of phenylalanine hydroxylase.
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