Definition:

Low-affinity sodium-dicarboxylate cotransporter, that mediates the entry of citric acid cycle intermediates, such as succinate, citrate, fumarate and alpha-ketoglutarate (2-oxoglutarate) into the small intestine and renal proximal tubule. Transports the dicarboxylate into the cell with a probable stoichiometry of 3 Na(+) for 1 divalent dicarboxylate, rendering the process electrogenic. Citrate is transported in protonated form as a divalent anion, rather than the trivalent form which is normally found in blood. Has a critical role in renal dicarboxylate transport (By similarity).