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Sodium channel protein

Mediates the voltage-dependent sodium ion permeability of excitable membranes. … Assuming opened or closed conformations in response to the voltage difference across the membrane, the protein forms a sodium-selective channel through which Na(+) ions may pass in accordance with their

Sodium/iodide cotransporter

Can also mediate the transport of chlorate, thiocynate, nitrate and selenocynate (PubMed:12488351)

Sodium-dependent multivitamin transporter

Sodium-dependent multivitamin transporter that mediates the electrogenic transport of pantothenate, biotin, lipoate and iodide (PubMed:10329687, PubMed:15561972, PubMed:19211916, PubMed:20980265, PubMed … Required for biotin and pantothenate uptake in the intestine across the brush border membrane (PubMed:19211916).

Sodium/calcium exchanger 1

Mediates the exchange of one Ca(2+) ion against three to four Na(+) ions across the cell membrane, and thereby contributes to the regulation of cytoplasmic Ca(2+) levels and Ca(2+)-dependent cellular processes … Required for normal embryonic heart development and the onset of heart contractions (By similarity)

Sodium-dependent dopamine transporter

Mediates sodium- and chloride-dependent transport of dopamine (PubMed:10375632, PubMed:12606774). … Also mediates sodium- and chloride-dependent transport of norepinephrine (also known as noradrenaline) (By similarity).

Sodium/glucose cotransporter 4

Electrogenic Na(+)-coupled sugar symporter that may play a primary role in D-mannose and possibly D-fructose and D-glucose transport at the plasma membrane. … Exclusively recognizes sugar substrates having a pyranose ring with an axial hydroxyl group on carbon 2

Sodium/hydrogen exchanger 2

Plasma membrane Na(+)/H(+) antiporter. Mediates the electroneutral exchange of intracellular H(+) ions for extracellular Na(+) (PubMed:10444453). Major apical Na(+)/H(+) exchanger in the base of the colonic crypt. Controls in the colonic...

Sodium-dependent proline transporter

Brain specific sodium (and chloride)-dependent proline transporter (PubMed:7651355). … Terminates the action of proline by its high affinity sodium-dependent reuptake into presynaptic terminals (Probable)

Sodium/myo-inositol cotransporter

Associates with KCNQ1-KCNE2 channel in the apical membrane of choroid plexus epithelium and regulates the myo-inositol gradient between blood and cerebrospinal fluid with an impact on neuron excitability … Maintains myo-inositol concentration gradient that defines cell volume and fluid balance during osmotic stress, in particular in the fetoplacental unit and central nervous system (By similarity).

Pyrophosphate