nervous system
• duration of action potential at half-maximal amplitude is decreased compared to in wild-type cells
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• after-hyperpolarization amplitude is increased compared to in wild-type cells
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• dorsal root ganglia neurons exhibit reduced potassium current amplitude compared to in wild-type cells
• neurons exhibit higher sensitivity to depolarizing stimuli compared with wild-type cells
• neurons at pH6.0 or treated with quinidine exhibit greater inhibition of potassium conductance compared with similarly treated wild-type cells
• however, bupivacaine-mediated inhibition of potassium conductance is normal
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