Questions: Which monoamine is synthesized from tryptophan? Thyroid hormone Melatonin Dopamine Epinephrine

Which monoamine is synthesized from tryptophan? Thyroid hormone Melatonin Dopamine Epinephrine
Transcript text: Which monoamine is synthesized from tryptophan? Thyroid hormone Melatonin Dopamine Epinephrine
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Solution

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The answer is the second one: Melatonin.

Explanation for each option:

  1. Thyroid hormone: This is incorrect. Thyroid hormones are not synthesized from tryptophan. They are derived from the amino acid tyrosine.

  2. Melatonin: This is correct. Melatonin is synthesized from tryptophan. Tryptophan is first converted into 5-hydroxytryptophan, then into serotonin, and finally into melatonin.

  3. Dopamine: This is incorrect. Dopamine is synthesized from the amino acid tyrosine, not tryptophan.

  4. Epinephrine: This is incorrect. Epinephrine is also synthesized from tyrosine, not tryptophan.

In summary, melatonin is the monoamine synthesized from tryptophan.

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