. "Catalysis of the transfer of L-isoleucine from one side of a membrane to the other. L-isoleucine is (2R*,3R*)-2-amino-3-methylpentanoic acid." . . . . . "isoleucine/valine:sodium symporter activity" . "leucine/isoleucine/valine porter activity" . "leucine/valine/isoleucine permease activity" . "L-isoleucine transmembrane transporter activity" . "L-isoleucine transporter activity" . . .