The following Glucose transporter move glucose across the membrane along its concentration gradient, that is from the higher to the lower glucose concentration.

1) Glucose Transporter GluT, for instance GluT1 are expressed in endothelial cells that line the blood vessels and that form the barrier between brain and blood. Small amount of GluT1 are also found in many other tissues.

2) GluT2 appears in Organes that release glucose into the blood, such as liver, kidney, intestine, pancreas.

3) GluT3 are found in the neuronal cells of the brain. The reason is that GluT3 has higher affinity to glucose than GluT1.

4) GluT4 are found in musle and fat cells.

5) GluT5 found in small intestine and kidney.

Another familly is called cotransporter (sodium-glucose linked transporter, SGLT) it pulls glucose against the gradient, it couples the transport of a glucose with a sodium ion. The enrgy comes from th sodium ion own mouvement along its own gradient.