Freely soluble in formic acid, very slightlysoluble in water,practically insoluble in ethanol and in ether. Dissolve in dilute hydrochloric acid and in dilute nitric acid. 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. It functions as a receiver of phosphate groups that are transferred by way of protein kinases (so-called receptor tyrosine kinases). Phosphorylation of the hydroxyl group changes the activity of the target protein.
L tyrosine is a precursor to neurotransmitters and increasesplasma neurotransmitter levels (particularly dopamine and norepinephrine)but has little if any effect on mood.The effect on mood is more noticeable in humans subjected to stressful conditions.

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.Tyrosine protects the skin from harmful UV light rays.
5.Tyrosine boosts one’s mood, concentration,learning,and memory.