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Molecular assay reagents intended to identify mutations in the sodium channel, voltage-gated, type IV, alpha subunit (SCN4A) gene, located at chromosome 17q23-q25.3, which encodes for the alpha subunit of a voltage-gated sodium channel. This genetic mutation has been identified in patients with hyperkalemic periodic paralysis, hypokalemic periodic paralysis, and paramyotonia congenita.
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