Which of the following amino acids is quickly converted to tyrosine ?
Correct answer: C. Phenylalanine
- A. Arginine
- B. Glycine
- C. Phenylalanine
- D. Leucine
Explanation
Phenylalanine is rapidly hydroxylated to tyrosine by phenylalanine hydroxylase, requiring tetrahydrobiopterin. Deficiency of this enzyme causes phenylketonuria and reduces tyrosine formation.
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