to more clearly define the role of the transepithelial electrical potential difference ( v m -- -- s ) , potassium permeability , and sodium-potassium pump rate in transcellular potassium transport by isolated turtle colon , we measured transmural potassium fluxes under open-circuit conditions in the presence and absence of putative blockers of potassium transport : amiloride and barium .
C0032821
potassium
C0002502
amiloride