Amino Acid Series
Product Introduction
Tyrosine is a nonessential amino acid the body makes from another amino acid called phenylalanine. It is an essential component for the production of several important brain chemicals called neurotransmitters, including epinephrine, norepinephrine, and dopamine.
Product Data Sheets
| Analysis | Description | Test Method |
| Appearance | White Powder | Visual |
| Odor | Characteristic | Nasil |
| Identification | Conform with reference sample | HPLC |
| Specific Rotation | -9.8°~ -11.2° | / |
| Loss on Drying | ≤0.5% | GB5009.3 |
| Residue on Ignition | ≤0.4% | GB5009.4 |
| Pb | ≤2.0 ppm | AAS |
| As | ≤2.0 ppm | AAS |
| Total Plate Count | ≤1000 cfu/g | GB/T4789.2 |
| Yeast and Mold | ≤100 cfu/g | GB/T4789.15 |
| Escherichia Coli | Absent | GB/T4789.3 |
| Salmonella/25g | Absent | GB/T4789.4 |
| Assay | 98.5% Min. | HPLC |
Function
Aside from being a proteinogenic amino acid, tyrosine has a special role by virtue of the phenol functionality. Its hydroxy group is able to form the ester linkage, with phosphate in particular. Phosphate groups are transferred to tyrosine residues by way of protein kinases. This is one of the post-translational modifications. Phosphorylated tyrosine occurs in proteins that are part of signal transduction processes.
It is one of several amino acids, the building blocks of proteins. It is involved in the structure of almost all proteins in the body.
It is a precursor to the neurotransmitters epinephrine, norepinephrine, and dopamine.
It helps to produce melanin, the pigment responsible for hair and skin color.
It helps the adrenal, pituitary, and thyroid glands produce hormones.
Product Application
Tyrosine is available as single amino acids or in amino-acid combinations. They also come as part of multivitamins, proteins, and food supplements. The forms include tablets, fluids, and powders.
Product Data Sheets
| Analysis | Description | Test Method |
| Appearance | White Powder | Visual |
| Odor | Characteristic | Nasil |
| Identification | Conform with reference sample | HPLC |
| Specific Rotation | -9.8°~ -11.2° | / |
| Loss on Drying | ≤0.5% | GB5009.3 |
| Residue on Ignition | ≤0.4% | GB5009.4 |
| Pb | ≤2.0 ppm | AAS |
| As | ≤2.0 ppm | AAS |
| Total Plate Count | ≤1000 cfu/g | GB/T4789.2 |
| Yeast and Mold | ≤100 cfu/g | GB/T4789.15 |
| Escherichia Coli | Absent | GB/T4789.3 |
| Salmonella/25g | Absent | GB/T4789.4 |
| Assay | 98.5% Min. | HPLC |
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