So 66% of that hemoglobin will unload and release the oxygen into the cells found inside that exercising tissue. And this is a big difference between the pure hemoglobin case. So what that means for some reason, the hemoglobin, when it's present inside red blood cells, the affinity for oxygen decreases. And that is precisely what allows the hemoglobin to unload so much oxygen to the tissues, to the tissues and cells of that exercising area. So once again, in red blood cells, hemoglobin is able to unload 66% of the oxygen when going from the lungs to the exercising tissue. While if we compare the pure hemoglobin, we see that pure hemoglobin only unloads 8% of that oxygen.