title: Theoretical and experimental basis for a specific countertransport system in membranes.
abstract: A sodium ion carrier transport system contains the antibiotic monensin in the membrane and uses a pH gradient as an energy source. The experimental results are in accord with theoretical predictions based on a mechanism which is understood on a molecular level.
mesh_terms: D000900:Anti-Bacterial Agents / Q000378:metabolism; D001693:Biological Transport, Active; D004058:Diffusion; D006863:Hydrogen-Ion Concentration; D008566:Membranes / Q000502:physiology*; D012964:Sodium / Q000378:metabolism*
chemical_list: D000900:Anti-Bacterial Agents; D012964:Sodium