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Life Science > Cell Biology > Learning Center > Pathway Slides & Charts  > Sodium Channel Structure
Cell Signaling & Neuroscience

Sodium Channel Structure
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Figure-3b

Sodium Channel Structure

The α subunit consists of four domains of six transmembrane segments, with the 5th and 6th segments comprising the pore formation unit. The β subunits consist of a single membrane spanning segment with an immunoglobulin-like fold in an extracellular domain. The α subunit contains the binding sites for a variety of toxins and drugs, as indicated.

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