A complete hemoglobin protein molecule consists of a total amino acid count of__________?
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Answer: C. 574
Explanation
A complete normal human hemoglobin protein molecule consists of four polypeptide chains totaling 574 amino acids. Two alpha chains and two beta chains fold together to form the functional quaternary protein structure. Counting every amino acid across all four constituent chains yields the exact total of 574. Hemoglobin is a complex globular protein responsible for transporting oxygen in vertebrate red blood cells. Polypeptide chains are linear polymers formed by amino acids linked together by peptide bonds. Protein sequencing techniques allow biochemists to determine the exact amino acid composition of macromolecules.
Genetic mutations altering this precise amino acid sequence can cause hemoglobinopathies like sickle cell anemia. Biochemical research into hemoglobin structure advanced our understanding of protein folding and evolution. Medical laboratories study hemoglobin variants to diagnose inherited blood disorders in patients. Five hundred fifty-four is an incorrect amino acid count that does not match standard human hemoglobin. Five hundred sixty-four is also an inaccurate numerical figure for the total amino acid residues. Five hundred eighty-four fails to reflect the precise biochemical sequencing data of normal hemoglobin.
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