TABLE 1

Effects of phloretin on voltage-dependent inactivation of I_to

Mean inactivation values, determined experimentally (Fig. 9) in the presence and absence of phloretin, were fit to an equation of the form fractional current = 1 - A/(1 + e^{(V_m - V)/k)}, where A is a scaling factor; V_m is the voltage at half-maximal inactivation, V is voltage, and k is the voltage sensitivity of inactivation.