Potassium Ionophores

TEFLabs offers the K+ selective ionophore, valinomycin, to complement our potassium indicators APG-1 and APG-2.

Valinomycin is highly selective for potassium ions over sodium ions within the cell membrane.  Valinomycin functions as a potassium transporter and facilitates the movement of potassium ions through lipid membranes. The stability constant, K, for the potassium-valinomycin complex is 106 and for the sodium-valinomycin complex only 10, maintaining the selectivity of valinomycin for the transport of potassium ions rather than sodium ions in biological systems.


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