And because of this energy difference, that basically drives the equilibrium towards the side where we form that alpha beta dimer. So this is described in the following diagram. So initially, we have an access amount of alpha subunits. And so what happens is to prevent the aggregation of these alpha complexes, our cells use the alpha hemoglobin stabilizing protein to basically form this complex that is stable enough and soluble in the blood plasma. So the alphahsp complex, and then when we have enough beta subunit, so when the beta subunits are produced by the red blood cells, they can then begin displacing this molecule and forming the alpha beta dimer. And this dimer is more stable than this dimer.