Primary active transport of a solute across a membrane, driven by exothermic flow of electrons from a reduced substrate to an oxidized substrate. Primary active transport is catalysis of the transport of a solute across a membrane, up the solute's concentration gradient, by binding the solute and undergoing a series of conformational changes. Transport works equally well in either direction and is driven by a primary energy source. [ https://www.worldcat.org/search?q=bn%3A0815340729 http://www.tcdb.org/tcdb/index.php?tc=3.D.-.-.- GOC:mtg_transport ]