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There are several different types of globin chains, named alpha, beta, delta, and gamma. Normal hemoglobin types include: 1  Hemoglobin A (Hb A): makes up about 95%-98% of hemoglobin found in adults; it contains two alpha (Î±) chains and two beta (Î²) protein chains.
12. Discuss hemoglobin relative to its chemical structure, its function, and the color changes it undergoes during loading and unloading of oxygen. Hemoglobin is made up of the protein globin bound to the pigment heme. Each molecule contains four polypeptide chains (globins) and four heme groups, each bearing an atom of iron in its center.