Functional expression of sodium channel mutations identified in families with periodic paralysis.

Abstract excerpt

Two mutations in the sodium channel alpha subunit that have been implicated as the cause of periodic paralysis were studied by functional expression in a mammalian cell line. Both mutations disrupted inactivation without affecting the time course of the onset of the sodium current or the single-channel conductance. This is the same functional defect that was observed in myotubes cultured from affected patients...

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