Facilitative hexose transporter that mediates the transport of glucose, fructose and galactose (  ). Likely mediates the bidirectional transfer of glucose across the plasma membrane of hepatocytes and is responsible for uptake of glucose by the beta cells; may comprise part of the glucose-sensing mechanism of the beta cell . May also participate with the Na(+)/glucose cotransporter in the transcellular transport of glucose in the small intestine and kidney . Also able to mediate the transport of dehydroascorbate .
Subcellular locations: Cell membrane
Liver, insulin-producing beta cell, small intestine and kidney.