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The range of membrane potential measured in zero current clamp mode is shown for 40 cells. Values ranged from −30 mV to −66 mV with a mean of −45 mV. There was no clear bimodal distribution, indicating a fairly homogenous cell population. The measured capacitance ranged from <40 to ∼180 pF, with a mean of 97.97 pF, reflecting the large variations in surface area of cultured cells. The mean input resistance was 1.27 GΩ with a range of 0.54 to 2.6 GΩ. RMP, resting membrane potential.
