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. And what that means is they have a very high affinity for the substrate molecule of the glucose. And under these normal blood concentrations of glucose, these two transporters are continually on and they're continually moving these glucose molecules down their concentration gradient. Now, let's talk a bit more about the glute three.