when needed by the body. If the hemoglobin is broken down in the blood stream, it breaks into particles called dimers. The two dimers produced from the hemoglobin are á1â1 and á2â2. These dimers are filtered through the kidneys as quickly as possible. The dimers are toxic in the renal tubules (Chang 1999)4.
             Figure 1 - Mechanism of the Hemoglobin molecule (Chang 1999)4
             The hemoglobin molecule has a conformational shape which allows for an increase in the amount of oxygen binding to the molecule with the increase of time. A slight change in the partial pressure of oxygen will produce a large change in the amount of oxygen released by the hemoglobin. The rate of
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