and http://www. eje-online. org/content/88/1/113Valinomycin interferes with the insulin releasing effect of glucose by increasing the potassium permeability of the B cell membrane.About ValinomycinIt is a member of the group of natural neutral ionophores because it does not have a residual charge. It is highly selective for potassium ions within the cell membrane and functions as a potassium-specific transporter. It facilitates the movement of potassium ions through lipid membranes "down" the electrochemical potential gradient. A very little literature is available regarding valinomycin.Theoretically, hyperpolarization of beta cells due to increased K+ permeability caused by valinomycin may lead to inhibition of insulin release (depolarization is needed for insulin release from beta cells).">