Sickle Cell Anaemia (SCA): A Genetic Analysis

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Sickle cell anaemia (SCA) is a class of transformation disorder in the β globin gene, which leads to the development of insoluble, sickle shaped red blood cells (RBC). The red blood cell (RBC) consists of two α globin chains and two β globin chains, forming the oxygen carrying molecule haemoglobin. Upon being oxygenated, the three-dimensional structure of sickle RBC is said to be normal but abnormal when it becomes deoxygenated. This is because the β sickle globin polymerised more than normal β globin during deoxygenating process. Thus RBC tends to shape itself into a crescent resulting in the slowness of the blood flow, which can cause the organs to be damaged, vaso-occlusive crises and stroke. Sickle RBC have a short lifespan than normal
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