anion transmembrane transporter activity antiporter activity active ion transmembrane transporter activity solute:anion antiporter activity 2019-04-03T16:23:14Z Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: anion(in) + solute(out) = anion(out) + solute(in). GO:0140323 molecular_function pg