Tyrosine (Tyrosine, abbreviated as Tyr or Y) [1] or 4 - hydroxyphenyl alanine, is one of 22 kinds of amino acids used for protein synthesis of the cells, the cells can be used for protein synthesis, codon for UAC and UAU, belonging to contain polar side groups, the human body can be synthesized non-essential amino acids. Word "tyrosine" is from the Greek tyros, meaning cheese. Early 19th century German chemist Justus Liebig • Von • First Division since casein found called tyrosine acyl do when used in functional groups or pendant when. Tyrosine can be synthesized in the body from phenylalanine, available in many high-protein foods such as chicken, turkey, fish, milk, yogurt, cheese, cheese, peanuts, almonds, pumpkin seeds, sesame seeds, soybeans, lima beans , avocados and bananas were found. Tyrosine (Tyr, tyrosine): One of nerve conduction material, can help overcome depression, improve memory, will lead to a lack of certain parts of the brain in the absence of adrenaline, it will cause problems with depression and emotional. Can promote thyroid Gland, adrenal and pituitary function of! Help anxiety, depression, allergies, headaches embolism treatment. It auxiliary melanin producing skin and hair. Lower plasma tyrosine and hypothyroidism related. It makes a good mood, suppress appetite, reduce body fat. Participation of phenylalanine in the liver preliminary decomposition. Tyrosine is also used in the synthesis of dopamine (dopamine), at the same time has been used detoxified. In a microorganism or plant, tyrosine through prephenate (a shikimate pathway resulting intermediate reaction product) produced, hydroxy oxidative decarboxylation prephenate obtained to be retained - hydroxyphenyl pyruvic acid, tyrosine and α- ketoglutarate use glutamate as a nitrogen source for amino transferase reaction - hydroxyphenyl pyruvate.