Definition: Catalysis of the transfer of a solute from one side of the membrane to the other, 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 powered by a primary energy source, directly using ATP. Primary energy sources known to be coupled to transport are chemical, electrical and solar sources.
GO:0022804 - active transmembrane transporter activity
Unification Links: GO:0015399
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