addition of the ionophore monensin to mouse neuroblastoma-rat glioma hybrid ng108-15 cells leads to a 20 to 30-mv increase in the electrical potential across the plasma membrane as shown by direct intracellular recording techniques and by distribution studies with the lipophilic cation [ 3h ] -tetraphenylphosphonium+ ( tpp+ ) [ lichtshtein , d. , kaback , h.r . & blume , a.j . ( 1979 ) proc . natl . acad . sci . usa 76 , 650-654 ] .
C0007634
cells
C0007603
plasma membrane