柯林斯词典tyrosine /ˈtaɪrəˌsiːn, -sɪn, ˈtɪrə-/ 1. N an aromatic nonessential amino acid; a component of proteins. It is a metabolic precursor of thyroxine, the pigment melanin, and other biologically important compounds 酪氨酸 返回 tyrosine