For 10 points, identify this catecholamine neurotransmitter, whose deficiency can lead to Parkinson's disease.
A polymorphism in one receptor of this compound has been positively associated with novelty-seeking behaviors and ADHD. This compound acts on the ventral tegmentum via the mesolimbic and mesocortical pathways. It is broken down by monoamine oxidase, and its synthesis begins with the hydroxylation of (*) tyrosine. This compound, antagonists to which can treat schizophrenia, is the precursor of norepinephrine, and a disease caused by abnormally low amounts of this compound can be treated by its precursor L-dopa. For 10 points, identify this catecholamine neurotransmitter, whose deficiency can lead to Parkinson's disease.
A polymorphism in one receptor of this compound has been positively associated with novelty-seeking behaviors and ADHD.
{dopamine}