And it is also soluble in the blood plasma. And by forming this complex, it basically prevents the aggregation and the precipitation of those alpha unit complexes. And this prevents many, many problems. So, once again, red blood cells produce a protein called alpha hemoglobin stabilizing protein. This protein binds onto the alpha subunomers to form soluble dimers. And this is precisely what prevents the aggregation of those alpha subunits to form insoluble precipitates that can basically precipitate out of the blood plasma and form and cause many different types of problems.