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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.
Dopamine. Dopamine is an important neurotransmitter found naturally in the brain. Dopamine (and norepinephrine) belongs to a subcategory of monoamines called catecholamines. The chemical structure of dopamine is C 8 H 11 NO 2 as is depicted in the picture above.The study of dopamine in methamphetamine use is very important as it is involved in the reinforcing effects of drug abuse. In general, dopamine is normally involved in many important functions such as mood, movement, and learning.he chemical structure of dopamine is C 8 H 11 NO 2 as is depicted in the picture above. The study of dopamine in methamphetamine use is very important as it is involved in the reinforcing effects of drug abuse. In general, dopamine is normally involved in many important functions such as mood, movement, and learning.