SCN9A(redirected from NENA)
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SCN9AA gene on chromosome 2q24 that encodes an alpha subunit of the voltage-gated sodium channel, which mediates voltage-dependent sodium ion permeability of excitable membranes. The SCN9A protein product plays a major role in nociception signalling.
SCN9A mutations are associated with primary erythromelalgia, channelopathy-associated insensitivity to pain and paroxysmal extreme pain disorder.