BIOMOLECULES AND ENZYMES

Detailed explanation-1: -TYROSINE. Another amino acid that has been extensively examined for behavioral effects is tyrosine, the precursor of three neurotransmitters: norepinephrine, dopamine, and epinephrine (see Table 14-2).

Detailed explanation-2: -Dopamine is produced from the amino acids tyrosine and phenylalanine, both of which can be obtained from protein-rich foods. Very high intakes of these amino acids may boost dopamine levels.

Detailed explanation-3: -The aromatic amino acids (tryptophan, tyrosine, phenylalanine) are the biosynthetic precursors for the neurotransmitters serotonin, dopamine, and norepinephrine.

Detailed explanation-4: -Two amino acids in each of D1 and D2 dopamine receptor cytoplasmic regions are involved in D1-D2 heteromer formation-PMC.