Enables the transfer of an ion from one side of a membrane to the other up the solute's concentration gradient. This is carried out by binding the solute and undergoing a series of conformational changes. Transport works equally well in either direction. [ GOC : mtg_transport https://www.worldcat.org/search?q=bn%3A0815340729 ]
active ion transmembrane transporter activity
This is just here as a test because I lose it