Q
how many amino acids are in hemoglobin
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Hemoglobin is a vital protein found in the red blood cells of almost all vertebrates and some invertebrates, responsible for oxygen transport from the lungs to the rest of the body. It is a tetramer composed of two alpha (α) and two beta (β) chains in adults, with minor variations in different life stages such as fetal development. Each of these polypeptide chains is made up of amino acids: the α chain consists of 141 amino acids, and the β chain has 146 amino acids. Therefore, a single hemoglobin molecule contains a total of 574 amino acids (2x141 for the α chains + 2x146 for the β chains). This complex structure allows hemoglobin to efficiently bind and release oxygen molecules, a key process in cellular respiration and energy production in the body. Understanding the amino acid composition of hemoglobin is crucial for studying its function, as well as the genetic mutations that can affect its structure and lead to disorders like sickle cell disease and thalassemia.
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