Which metabolite is the end product of dopamine metabolism?

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Multiple Choice

Which metabolite is the end product of dopamine metabolism?

Explanation:
Dopamine is first deaminated by MAO to DOPAC, and then DOPAC is methylated by COMT to form homovanillic acid, which is the final metabolite excreted. This makes homovanillic acid the end product of dopamine metabolism. In contrast, vanillylmandelic acid is the final metabolite for norepinephrine and epinephrine, while metanephrine and normetanephrine are intermediate metabolites formed earlier in the metabolism of those catecholamines.

Dopamine is first deaminated by MAO to DOPAC, and then DOPAC is methylated by COMT to form homovanillic acid, which is the final metabolite excreted. This makes homovanillic acid the end product of dopamine metabolism. In contrast, vanillylmandelic acid is the final metabolite for norepinephrine and epinephrine, while metanephrine and normetanephrine are intermediate metabolites formed earlier in the metabolism of those catecholamines.

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