Sodium-glucose symporter

Sodium-glucose Symporter is a transmembrane protein and is an example of sodium-driven Secondary active transport that occurs in the epithelial cells of the small intestines[1]. The sodium-glucose symporter is found on the Apical membrane of the epithelal cells[2]. The sodium and glucose bind to the symporter and are simultaneously both co-transported into the epithelial cells. The sodium driven-glucose symporter uses the potential free energy stored in the sodium electrochemical gradient (low sodium concentration inside the epithelial cells) established by Sodium-potassium pump[3]. Therefore, the sodium influx from the lumen to the epithelial cell is coupled with glucose transport.

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