L-Tyrosine by MP Biomedicals is a high purity amino acid. Also known as 4-hydroxyphenylalanine, this is a hydrophilic amino acid with a polar side group. This preparation is available as an off-white powder which is more soluble in alkaline and acidic aqueous solutions than compared to water. Tyrosine functions as a receiver of phosphate groups that are transferred by way of protein kinases. Phosphorylation of the hydroxyl group in such kinases can change the activity of the target protein, or may form part of a signalling cascade via SH2 domain binding. CAS No. 60-18-4 Quantity Provided: 50 gm per pack Molecular Formula: C9H11NO3 Molecular Weight: 181.19 Soluble in water L-Tyrosine is widely used in chemical and biological sectors. L-Tyrosine has been reported to assist in the production of melanin, the pigment found in hair and skin. Tyrosine is also used by the thyroid and adrenal glands to manufacture natural hormones, which regulate the body's ability to produce energy. Tyrosine is a precursor to dopamine, and therefore, it plays a role in neurotransmission signalling and the regulation of depression. It further serves to release the appetite suppressing hormone, CCK, and assists in combatting allergic reactions.