L-tyrosine is an essential amino acid that can be extracted from hydrolysate containing casein or corn. It appears as a colorless or white crystalline powder with the molecular formula C9H11NO3, molecular weight 181.19, CAS number 60-18-4.
L-tyrosine can be used as raw materials for synthetic drugs in the medical field, such as antibiotics, peptide hormones and L-dopamine, and as food additives in the food field.
L-tyrosine can be obtained by extracting the hydrolysate of protein material, or it can be prepared by other methods, such as fermentation of L-tyrosine by l-tyrosine producing bacteria induced by Bacillus brevis from glucose as feedstock, or by β -tyrosine catalyzed by phenol, ammonia and pyruvate as feedstock. L-tyrosine is a kind of widely used amino acid with many preparation methods and wide application fields.