Fig. 1

Mean group results of NETs including SR curve, TE, RC and I/V slope. Dark square: workers; light circle: controls. Left upper: hyperpolarization of the resting membrane potentials was found in SR curve. Right upper: The curve in hyperpolarized conditions for the worker group was significantly deviated downward starting from the S1 phase and most separated in the S3 phase, then gradually became closer to the curve of the control group during the overshoot phase. Left lower: The curve during the subexcitability phase was slightly deviated upward in the worker group. Right lower: Although only segmental (-20~-40%) left deviation during hyperpolarized, the difference was significant (p = 0.03). The overall interpretation suggests that the resting membrane potential was hyperpolarized because of the tendency of over-expressed potassium channels with relatively adequate inward rectifying channels