Physiology & Biochemistry · single question
Decarboxylation of which amino acid produces a vasodilator?
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Correct answer: B. Histidine
Decarboxylation of histidine produces histamine u2014 a potent vasodilator that dilates capillaries and increases vascular permeability, mediating allergic/inflammatory reactions. Arginine produces nitric oxide (also a vasodilator) but via oxidation, not decarboxylation.
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