. "Catalysis of the transfer of L-tyrosine from one side of a membrane to the other. L-tyrosine is 2-amino-3-(4-hydroxyphenyl)propanoic acid." . . . "valine/tyrosine/tryptophan permease activity" . "L-tyrosine transmembrane transporter activity" . "L-tyrosine permease activity" . "L-tyrosine transporter activity" . . . .