A 6-year-old child is diagnosed with sickle cell disease. Ge…
A 6-year-old child is diagnosed with sickle cell disease. Genetic testing shows a mutation in the gene encoding the β-chain of hemoglobin, where a single amino acid in the protein sequence is changed. This small change alters the structure and function of hemoglobin, leading to abnormal red blood cells and clinical symptoms. Why does a change in a single amino acid cause such significant effects in this patient?