Now, if we add one more oxygen so that two of these heaton groups are filled, what we see happen is the arrow becomes longer going this way. And now these two arrows are equal in size. And what that means is both of these states will exist in the same proportion. So 50 50. Now, if we add one more oxygen, what we see happen is the equilibrium now shifts towards the arc state, and this arrow becomes longer than this arrow. And so now what we see happen is this is the structure, the state of the hemoglobin that will predominate.