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Dopamine: one of the catecholamine neurotransmitters in the brain; it is derived from tyrosine and is the precursor to norepinephrine and epinephrine; dopamine is a major transmitter in the extrapyramidal system of the brain, and important in regulating movement; dopamine receptors mediate its action.Source: CRISP.t is derived from tyrosine and is the precursor to NOREPINEPHRINE and EPINEPHRINE. Dopamine is a major transmitter in the extrapyramidal system of the brain, and important in regulating movement. A family of receptors (RECEPTORS, DOPAMINE) mediate its action. Source: MeSH 2007.
by admin. Dopamine vs Serotonin. Dopamine and serotonin are the biogenic amines, and both are known as neurotransmitters secreted by nerve cells that influence the activity of other nerve cells. These amines are very important substances as they influence mental, emotional, and physical health of humans.opamine vs Serotonin. â¢ Dopamine is derived from tyrosine amino acid, while serotonin is derived from the amino acid called tryptophan. â¢ Dopamine production is localized in the basal ganglia, whereas serotonin production is localized in the raphe nucleus of the reticular formation.