Essential Biochemistry - Protein Metabolism (Section 1 - No. 1)
Which enzyme catalyzes the committed step in the biosynthesis of serotonin?
Tryptophan hydroxylase
Tyrosine hydroxylase
Phenylalanine hydroxylase
DOPA decarboxylase
Explanation
Tryptophan hydroxylase catalyzes the rate-limiting step in serotonin biosynthesis.
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