. . "an amino acid found in most proteins; a precursor of several hormones"@en-us . "110820597"@en-us . . "15082766-n"^^ . "an amino acid found in most proteins; a precursor of several hormones"@en-us . "tyrosine"@en-us . "0"^^ . "tyrosine"^^ . "115082766"^^ . "114228383"@en-us . . "0"^^ . . . . . .