Which of the following is the ratelimiting enzyme in the biosynthesis of catecholamines?
Correct Answer: Tyrosine hydroxylase
Description: Tyrosine hydroxylase is the rate-limiting enzyme in the biosynthesis of catecholamines. Tyrosine is first hydroxylated to form 3,4- dihydroxyphenylalanine (DOPA) by the enzyme tyrosine hydroxylase. This enzyme is abundant in the central nervous system, the sympathetic ganglia, and the adrenal medulla Reference: Harpers illustrated biochemistry 30th edition
Category:
Biochemistry
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