secondary active transmembrane transporter 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. GO:0015290 GO:0015291 GO:0015353 GO:0015404 GO:0015570 Reactome:R-HSA-199216 TC:2.A active transporter coupled carrier electrochemical potential-driven transporter activity energizer of outer membrane receptor-mediated transport activity galactose/glucose (methylgalactoside) porter activity heavy metal ion porter activity ion-gradient-driven energizer activity molecular_function multidrug endosomal transmembrane transporter activity nitrite/nitrate porter activity porter activity porters secondary carrier-type facilitators active transmembrane transporter activity