L-Tyrosine
Description:
Product Name: L-Tyrosine
Molecular Formula： C9H11NO3
Molecular Weight： 181.19
CAS No： 60-18-4
L-Tyrosine or tyrosine or 4-hydroxyphenylalanine is one of the 20 standard amino acids that are used by cells to synthesize proteins. It is a non-essential amino acid with a polar side group. The word "tyrosine" is from the Greek tyrós, meaning cheese, as it was first discovered in 1846 by German chemist Justus von Liebig in the protein casein from cheese. It is called tyrosyl when referred to as a functional group or side chain. While tyrosine is generally classified as a hydrophobic amino acid, it is more hydrophilic than phenylalanine.[5] It is encoded by the codons UAC and UAU in messenger RNA.
Aside from being a proteinogenic amino acid, tyrosine has a special role by virtue of the phenol functionality. It occurs in proteins that are part of signal transduction processes and functions as a receiver of phosphate groups that are transferred by way of protein kinases. Phosphorylation of the hydroxyl group can change the activity of the target protein, or may form part of a signaling cascade via SH2 domain binding.
A tyrosine residue also plays an important role in photosynthesis. In chloroplasts (photosystem II), it acts as an electron donor in the reduction of oxidized chlorophyll. In this process, it loses the hydrogen atom of its phenolic OH-group. This radical is subsequently reduced in the photosystem II by the four core manganese clusters.
Tyrosine is an amino acid building blocks of proteins, and having a side chain having an aromatic ring of ionization, is addicted to the aqueous, tyrosine in the human and animal bodies is generated by the hydroxylation of phenylalanine, so when phenylalanine nutrition is adequate, it is non essential amino acid. L-Tyrosine is one of the 22 proteinogenic amino acids that are used by cells to synthesize proteins. L-Tyrosine is biologically converted from L-phenylalanine and is in turn is converted to L-DOPA and further converted into the neurotransmitters: dopamine, norepinephrine, and epinephrine.
Specifications:
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L-Tyrosine
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USP38
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AJI92
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EP8
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CP2015 ( Injection Grade )
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Assay
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98.5-101.5%
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99.0-100.5%
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99.0-101.0%
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≥99.0%
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PH
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/
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5.0-6.5
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/
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5.0-6.5
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Specific rotation[a]D20
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/
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-11.3°--12.1°
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-11.0°--12.3°
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-11.3°--12.1°
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Specific rotation[a]D25
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-9.8°--11.2°
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/
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/
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/
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Transmittance(T430)
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/
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≥95.0%
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clear & colorless
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≥95.0%
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Chloride(Cl)
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≤0.04%
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≤0.02%
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≤0.02%
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≤0.02%
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Ammonium(NH4)
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/
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≤0.02%
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≤0.02%
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≤0.02%
|
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Sulfate(SO4)
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≤0.04%
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≤0.02%
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≤0.03%
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≤0.02%
|
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Iron(Fe)
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≤30PPM
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≤10PPM
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≤10PPM
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≤10PPM
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|
Heavy metals(Pb)
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≤15PPM
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≤10PPM
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≤10PPM
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≤10PPM
|
|
Arsenic
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/
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≤1PPM
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/
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≤1PPM
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Other amino acids
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individual impurities≤0.5% total impurities≤2.0%
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conform
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/
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≤0.40%
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Ninhydrin-positive substances
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/
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/
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conform
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/
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Loss on drying
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≤0.3%
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≤0.20%
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≤0.50%
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≤0.20%
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Residue on ignition
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≤0.40%
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≤0.10%
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≤0.10%
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≤0.10%
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|
Organic volatile impurities
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/
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/
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/
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/
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Endotoxin
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/
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/
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/
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<0.25EU/ml
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Function:
1.L-Tyrosine is an important biological reagent. 2.L-Tyrosine can be used in pharmaceutical interdediates, biochemical study, life sciences, agricultural research, beverage additive and feed stuff, etc. 3.L-Tyrosine helps to calm the body, increase energy and enhance libido. 4.L-Tyrosine protects the skin from harmful UV light rays. 5.L-Tyrosine boosts one's mood, concentration,learning,and memory.
Application:
L-Tyrosine is used in hyper-thyroidism treatment; Special flavoring can be produced heated and reacted with saccharides.
1. N-Acetyl-L-Tyrosine is an important biological reagent.
2. N-Acetyl-L-Tyrosine can be used in pharmaceutical interdediates, biochemical study, life sciences, agricultural research, beverage additive and feed stuff, etc.
3. N-Acetyl-L-Tyrosine helps to calm the body, increase energy and enhance libido.
4. N-Acetyl-L-Tyrosine protects the skin from harmful UV light rays.
5. N-Acetyl-L-Tyrosine boosts one's mood, concentration,learning,and memory. |
