title: Modified transport substrates as probes for intramembrane gradients.
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D000596:Amino Acids / Q000378:metabolism; D000621:Aminoisobutyric Acids / Q000378:metabolism / Q000494:pharmacology; D000818:Animals; D001693:Biological Transport, Active; D002250:Carbon Radioisotopes; D002264:Carboxylic Acids / Q000378:metabolism; D002286:Carcinoma, Ehrlich Tumor / Q000378:metabolism*; D002462:Cell Membrane / Q000187:drug effects / Q000378:metabolism; D002794:Choline / Q000494:pharmacology; D004140:Dinitrophenols / Q000494:pharmacology; D006096:Gramicidin / Q000494:pharmacology; D007700:Kinetics; D008239:Lysine / Q000378:metabolism; D008564:Membrane Potentials; D008722:Methods; D051379:Mice; D008954:Models, Biological; D010880:Piperidines / Q000378:metabolism; D012964:Sodium / Q000378:metabolism / Q000494:pharmacology; D013997:Time Factors
chemical_list: D000596:Amino Acids; D000621:Aminoisobutyric Acids; D002250:Carbon Radioisotopes; D002264:Carboxylic Acids; D004140:Dinitrophenols; D010880:Piperidines; D006096:Gramicidin; D000255:Adenosine Triphosphate; D012964:Sodium; D008239:Lysine; D002794:Choline