Useful Amino Acid for Health: Tyrosine

Tyrosine: The Tyrosine is an aromatic amino acid that can absorb the light. It arises form the reaction of phenylalanine catalyzed by phenylalanine hydroxylase. The essential amino acid phenylalanine, tyrosine is not, if the diet contains sufficient amounts of phenylalanine. The reaction is not reversible, so can not replace the requirement for phenylalanine, tyrosine. Tyrosine has action to spare, because if then fed tyrosine to phenylalanine in the body need isdecreased. Both the amino acids are ketogenic and glycogenic simultaneously. Both have an enormous role in the metabolism of the body and are metabolized through the joint. The results in education Azetessigsäure tyrosine, phenol, tyramine, epinephrine (adrenaline), non-adrenaline (or epinephrine), thyroid hormones, and melanin in separate reactions.

Tyrosine is essential for protein synthesis and serves as a precursor for thyroxin, melanin and catecholamines.

TheAmino acid tyrosine, found in chickens and also increases tuna, chemicals in the brain that improve the motivation and responsiveness. The defective hereditary metabolic disorders of tyrosine tyrosinosis, Alcaptonuria (occhronosis) and albinism, which are described below.

The excess of tyrosine, when serum levels of tyrosine, at 6-12 shall mg / dL, as of methionine, as a condition Tyrosinosis, effects on the activity of several enzymes and transport systems. In acutetyrosinosis infants have diarrhea, vomiting with cabbage smell and prosper. In the absence of treatment, death from liver failure in 6-8 months. In chronic tyrosinosis, symptoms are similar, but milder, and death occurs by age 10 years. The treatment consists of a diet low in phenylalanine and tyrosine, also deeply a few times in methionine.

The other metabolic disorder is tyrosinosis. Type II, in which serum tyrosine levels increased to at 4-5 mg / dl, liverwith eye and skin lesions, and some mental retardation. It is the only amino acid whose concentration in the urine, whereas the renal clearance and absorption of tyrosine increases fall within the normal limits.

Another disorder, neonatal tyrosinosis, where are collected the blood levels of tyrosine and phenylalanine, which is raised in the urine of tyrosine levels. The treatment consists of a diet low in protein.

Melanins are polymers catabolites of tyrosine catalyzed by tyrosine hydroxylase. Albinos withTo convert tyrosine hydroxylase: not as a negative lack all visual pigment and hair follicles added tyrosine to pigment, as some positive visual pigment and hair follicles have to convert tyrosine to black eumelanin in vitro.

Tyrosine is converted into adrenaline and adrenaline on yet always present in the cells of neuronal origin by enzymes in the adrenal medulla. The rate of enzyme in the process of catecholamine biosynthesis is tyrosine hydroxylase. Tyrosine is also a precursor of the thyroidHormones. Free tyrosine can be iodinated by reaction organification. Ascorbic acid (vitamin C) is required in the degradation of tyrosine, and also in the synthesis of adrenaline from tyrosine.

It is particularly in Ragi, parboiled rice, cow pea, peas, soybeans, pumpkin leaves, spinach, colocasia, Yam, ladies finger, brinjal, grount mother gingelly seeds, figs, strawberries, cottage cheese, milk.

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