These molecules are continually shuttling and moving these glucose molecules down their concentration gradient. So, once again, glute one is the glucose transported that we find all over our body in all different types of cells. And we find them predominantly in the membranes of red blood cells. And these are responsible, along with the help of glute three, for generating the basal rate of glucose uptake. So we see that blood glucose levels are maintained at a value of around five millimolar concentrations. But the Km value of glute one, as well as glute three is around 1 million molar.