Primary active transport of a solute across a membrane driven by a methyl transfer reaction. 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 GOC:mtg_transport http://www.tcdb.org/tcdb/index.php?tc=3.C.-.-.- ]