Tyrosine

A non-essential amino acid. In animals it is synthesized from phenylalanine. It is also the precursor of epinephrine, thyroid hormones, and melanin.

An amino acid that is the precursor of three major neurotransmitters: norepinephrine, epinephrine, and dopamine.

A non-essential amino acid, formed in the body from phenylalanine; the precursor for the synthesis of melanin (the black and brown pigment of skin and hair), and adrenaline and noradrenaline.

A phenolic a-amino acid. It is a precursor of the hormones epinephrine, norepinephrine, thyroxine, and triiodothyronine. It is also a precursor of the molecule known as melanin (which is the pigment of a suntan).

A nonessential amino acid spares the essential amino acid phenylalanine.

An amino acid in protein which is a component of thyroxine, and is’ a precursor to the catecholamines dopamine, noradrenaline and adrenaline.

An essential amino acid that converts into the neurotransmitter norepinephrine, which regulates the mood.

An amino acid that results from the hydroxylation of phenylalanine.

Tyrosine is an essential amino acid containing a hydroxyl group. Tyrosine is required for the formation of the body’s proteins and can be metabolized to a variety of neurotransimitters and hormones including L-DOPA, dopamine, norepinephrine, epinephrine, melanin, and thyroid hormone.

Ability to decompose the amino acid tyrosine is a characteristic of some Nocardia species. Five per cent tyrosine in nutrient agar is cultivated for a month; decomposition is indicated by dissolution of crystals adjacent to the colonies.

Amino acid found in most proteins, and a precursor of several hormones.

One of the amino acids. Tyrosine is important in the production of catecholamines, melanin and thyroxine.

An amino acid present in many proteins, especially casein. It serves as a precursor of epinephrine, thyroxine, and melanin. Two vitamins (ascorbic acid and folic acid) are essential for its metabolism.