secondary active transmembrane transporter activity coupled carrier GO:0015570 secondary carrier-type facilitators GO:0015290 ion-gradient-driven energizer activity porters multidrug endosomal transmembrane transporter activity GO:0015291 energizer of outer membrane receptor-mediated transport activity GO:0015353 nitrite/nitrate porter activity heavy metal ion porter activity GO:0015404 TC:2.A galactose/glucose (methylgalactoside) porter activity electrochemical potential-driven transporter activity active transporter molecular_function porter activity Enables the transfer of a solute from one side of a membrane to the other, up its concentration gradient. The transporter binds the solute and undergoes a series of conformational changes. Transport works equally well in either direction and is driven by a chemiosmotic source of energy, not direct ATP coupling. Secondary active transporters include symporters and antiporters. active transmembrane transporter activity