And what that means is a high concentration of two three BPG inside the red blood cells shifts the entire oxygen hemoglobin. So, dissociation curve to the right. And to see what we mean by that, let's take a look at the following diagram. So, the Y axis is the percent saturation of hemoglobin, and we range from zero to 100%. The x axis is the partial pressure of our oxygen inside our tissue, exercising our tissue, and that is given to us in millimeters of mercury. And so we begin at zero mmhg, and we end up at 100 hhmg.