What is the oxygen-binding protein in red blood cells?

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Expert Solution

Hemoglobin is the oxygen binding protein in red blood cells.

hemoglobin is a large complex molecule containing a globular protein and a pigmented iron containing complex call heam. Each hemoglobin molecule contains for globin chains and four heam units, each with one atom of iron. As each atom of iron can combine with an oxygen molecule, this means that a single hemoglobin molecule can carry upto 4 molecules of oxygen. An average red blood cell carries about to 280 million hemoglobin molecules, giving each cell a theoretical oxygen carrying capacity of over a billion oxygen molecules.iron is carried in the bloodstream bound to its transport protein, transferritin, stored in the liver. Normal red cell production requires a steady supply of iron.

when all four oxygen binding sites on a hemoglobin molecule are full, it is described as saturated. Hemoglobin binds reversibly to oxygen to form oxyhaemoglobin.

as the oxygen content of blood increases its colour changes too.blood rich in oxygen is bright red because of the high levels of oxyhaemoglobin it contains, compared with blood with lower oxygen levels, which is dark in colour because it is not saturated.

Sydney Mullin answered 6 months ago

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