is a white crystalline amino acid produced by the hydrolysis of a number of proteins, such as casein. Casein is a constituent of cheese. Formula C9H11NO3. Greek, tyros cheese + German -in).
An amino acid found in most proteins and is a precursor of thyroid hormones.
One of the twenty amino acids directly coded in proteins. Nonessential in humans since can be synthesized from phenylalanine. It is the amino acid from proteins that is converted through several metabolic steps to melanin. It is added to tanning accelerator products to supplement the body's normal level of tyrosine at the skin's pigment cell level thereby speeding the tanning process. Tyrosine is the amino acid in hair that color adheres to.
an essential amino acid in the diet.
(Tyr, Y) An amino acid.
Amino acid necessary for the production of the thyroid hormone.
bulky amino acid.
Plays a roll in the function of the adrenal, thyroid and pituitary glands. May help to create positive feelings elevate moods and increase alertness and ambition. It can also be used in cases of high blood pressure, the aging of cells, Parkinson's disease, muscle development, allergies, cancer and irritability.
An amino acid. The PAH enzyme normally converts Phe to Tyr.
transmits nerve impulses to the brain; helps overcome depression; improves memory; increases mental alertness; promotes the healthy functioning of the thyroid, adrenal and pituitary glands.
the amino acid from which dopamine is made.
An alpha- amino acid present in most proteins.
An amino acid and the precursor to the neurotransmitters dopamine and noradrenaline.
A nonessential amino acid.
A conditionally essential amino acid, tyrosine can elevate mood and is a precursor of the brain neurotransmitters dopamine, norepinephrine and epinephrine.
An amino acid involved in catecholamine production that is converted to L-dopa by the enzyme tyrosine hydroxylase. This is the rate-limiting enzyme in the biosynthetic pathway for all the catecholamines and is sensitive to feedback control. It is responsible for controlling downstream catecholamine levels and helps assure that biosynthesis or supplementation will not raise excitatory neurotransmitters too high.
An amino acid in skin that initiates the production of melanin (melanin is the component of skin that gives it "color"). According to information on the FDA's Web site (www.fda.gov), tyrosine's "use is based on the assumption that it penetrates the skin, increases the tyrosine content of the melanocytes, and thus enhances melanin formation.
An amino acid used by the system to make melanin.
A building block of protein, tyrosine is the amino acid in hair that color adheres to.
An essential amino acid in mammals. It contains a highly hydrophobic aromatic sidechain. [ see schematic diagram
the amino acid precursor of melanin, thyroxine, and adrenalin.
Related Topic"...May be important for neurotransmitter synthesis and mood regulation..."
Tyrosine (from the Greek tyros, meaning cheese, as it was first discovered in 1846 by German chemist Justus von Liebig in cheesehttp://www.infoplease.com/ce6/sci/A0849873.html Tyrosine at infoplease.comhttp://www.etymonline.com/index.php?l=t&p=24 Tyrosine at etymonline.com), 4-hydroxyphenylalanine, or 2-amino-3(4-hydroxyphenyl)-propanoic acid, is one of the 20 amino acids that are used by cells to synthesize proteins. It has a phenol side chain with a hydroxyl group. Upon the location of the hydroxyl group, there are three structural isomers of Tyr, namely para-Tyr (p-Tyr), meta-Tyr (m-Tyr) and ortho-Tyr (o-Tyr).